116 Matching Annotations
- Jul 2019
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Sequence analysis
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DNA sequencing of the 18S rDNA fragment
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Purification of PCR product
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Analysis of internal transcribed spacer region
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RAPDand SSRscoring and data analysis
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PCR amplification
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Running of gel and visualization of DNA
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Determination of the yield
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Agarose gel electrophoresis
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Qualitative and quantitative estimation of DNA
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Determination of the yield
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Procedure for DNA isolation
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Reagents required for fungal DNA isolationand p
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DNA isolation of Trichodermaisolate
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Photography, evaluation and documentation
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Procedurefor SDS-PAGE
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Materialsrequired for SDS-PAGE
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Protein profiling of bioagent through SDS-PAGE
Tags
- md-2-md-11-md-1-md-10
- md-1-md-2
- md-1-md-2-mt-2
- md-2-md-11-md-1-md-5
- md-2-md-11-md-1-md-2
- md-2-md-1
- md-2-md-11-md-1-md-7
- md-1-md-2-mt-1
- md-2-md-11-md-1-md-6
- md-2-md-11-md-1-md-1
- md-1-md-2-mt-3
- md-2-md-11-md-1-md-11
- md-2-md-11-md-1-md-4
- md-2-md-11-md-1-md-8
- md-2-md-11-md-1-md-3
- md-2-md-11-md-1-md-12
- md-2-md-11-md-1-md-9
Annotators
URL
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Validations
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Mapping of SbDof genes on sorghum chromosomes and its intron/exon gene structure prediction
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Sequencing PCR
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Minipreparation of plasmid DNA from transformed co
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Restriction digestion
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Basic requirements for PC
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DNA extraction procedure
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Algorithm
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Data Sources
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Poisson Model
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Haemolymph protein profiling
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Starvation and collection method
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Insects Collection
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Head and stylet preparation
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Experimental Set up
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- Jun 2019
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krishikosh.egranth.ac.in krishikosh.egranth.ac.in
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Experiment 1: Assessing the impacts of elevated CO2and N levels on yield and nutrient uptake in rice
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Temperature Gradient Tunnels (TGT)
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krishikosh.egranth.ac.in krishikosh.egranth.ac.in
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Estimation of total N% of wheat grainsand straw
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Chlorophyllcontent
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Root length (cm) and Root weight (mg)
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Coleoptile length(cm)
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Stomata / cm2
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Leaf area index (LAI)
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Physiological parameters
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Days to physiological maturity
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.inThesis3
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Reagents
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Standard curve of ascorbic acid
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ZnSO4
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Procedur
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Procedur
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Procedure
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Procedure
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Reagent
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Total antioxidant activit
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Procedur
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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Total dissolved solids
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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High Performance Liquid Chromatography (HPLC) analysis
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High Performance Thin Layer Chromatography (HPTLC) analysis
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. Thin Layer Chromatography (TLC) analysis
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Preliminary phytochemical screening (Ali, 1998; Evans, 2002)
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Microbial Contamina
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Foaming Index
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pH values
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Ash values
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Extractive value
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. Physico-chemical standardization
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Standardization of ethanolic extract of E.ribes (WHO, 1998; IndianPharmacopoeia, 1996)
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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Estimation of Stevioside
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Estimation of Steviol
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Estimation of total phenols
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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Balanced mesomorph:
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- May 2019
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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werethen recovered by centrifugation at 12,000 rpm for 30-min. The pellet was washed oncewith 70% ethanol, air-dried and re-suspended in 100 μl of TE-buffer. It was treatedwith RNase at a concentration of 20 μg/ml by incubating at 37ºC for 1-hr. It was furtherextracted with an equal volume of phenol:chloroform mixture followed bychloroform:isoamyl alcohol (24:1) mixture. After centrifugation, the clear supernatantwas used for recovering the nucleic acids. The nucleic acids were precipitated with 200μl of alcohol in presence of 0.3 M sodium acetate (Sambrook and Russell, 2001). In casewhere high purity plasmid preparations are required (DNA sequencing) the plasmidisolation was carried out with the commercially available kits following themanufacturer’s instruction. Plasmids were observed on 1% agarose gel
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1.5 ml of cells from an overnight culture waspelleted by centrifuging in cold (4ºC) for10-min at 6000 rpm. The cells were re-suspended in 200 μl solution I (50 mM glucose; 25 mM Tris-Cl, pH-8; 10 mM EDTA, pH-8) with vortexing. 400 μl of freshly preparedsolution II (0.2% NaOH, 1% SDS) was added and mixed by gently inverting the tubes.Subsequently, 300 μl of solution III (prepared by mixing 60 ml of 5 M CH3COOK,11.5 ml glacial acetic acid, 28 ml water) was added and the tubes were invertedrepeatedly and gently for homogeneous mixing followed by incubation for 5-min onice. After centrifuging at 12,000 rpm for 15-min, supernatant wasdecanted into a freshtube, an equal volume of iso-propanol was added, the precipitated nucleic acids
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Isolation of plasmid DNA
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The colonies to be tested were streaked on the surface of minimal A-glucose plates containing either 0.4-0.7 M NaCl with 1 mM glycine betaine, and incubated at 37oC. NaCl-tolerant strains grew toform single colonies in 36-60 hrs whereas NaCl-sensitive ones did not. As controls, MC4100 (WT) and other previously identified NaCl sensitive mutants were streakedfor comparison
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NaCl-sensitivity testing
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Competent cells for high efficiency transformations were prepared by a method ofInoue et al. (1990) with few modifications. An overnight culture of the strain (routinelyDH5α) was sub-cultured into fresh sterile LB-brothin 1:100 dilutions and grown at 18ºC to an A600of 0.55. The cells were harvested by centrifugation at 2500 rpm for 10-min at 4ºC. This was re-suspended in 0.4 volumes of INOUE buffer and incubated inice for 10 min. The cells were recovered by centrifugation at 2500 rpm at 4ºC for 10-min and finally re-suspended in 0.01 volume of the same buffer. Sterile DMSO wasadded to a final concentration of 7%. After incubating for 10-min in ice, the cells werealiquoted in 100 μl volumes, snap frozen in liquid nitrogen and stored at –70ºC
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Preparation of high efficiency competent cells
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the infection mixture was centrifuged, washed in 5 ml of citratebuffer and plated without phenotypic expression
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To 2 ml of fresh overnight culture of recipient strain, 108pfu equivalent of phage lysatewas added and incubated at 37ºC without shaking for 15-min to facilitate phageadsorption. The un-adsorbed phage particles were removed by centrifugation at 4000rpm for 5-min and pellet of bacterial cells was re-suspended in 5 ml of LB-brothcontaining 20 mM sodium citrate to prevent further phage adsorption. This wasincubated for 30-min at 37ºC without shaking to allow the phenotypic expression of theantibiotic resistance gene. The mixture was then centrifuged, and the pellet was resuspendedin 0.3 ml citrate buffer. 100 μl aliquots were plated on appropriate antibioticcontaining plates supplemented with 2.5 mM sodium citrate. A control tube withoutaddition of P1 lysate was also processed in the same way. In the case of selection ofnutritional requirement,
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Phage P1 transduction
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Themethod was used for isolation of good quality genomic DNA that wasused to map Tn7insertionin C. glabratamutants.Briefly,10 mlsaturated yeast culturewasharvested, resuspendedin 1 ml sterile water and transferred toa2 ml microcentrifuge tube. Cells were pelleteddown by centrifugation at 4,000 rpm for 5 min. Supernatant was discarded and the pellet was resuspendedin 500 μl freshly prepared solutioncontaining100mM EDTAand 5% β-mercaptoethanol andincubated at 42 ̊C for 10 min. After incubation,cells were spun down at 5,000 rpm for 1 minand resuspendedin 500μl freshly-prepared BufferB. One tip full of lyticase(Sigma # L4025) was added and cellsuspension was incubated at 37 ̊C for 1 h. Following incubation,cell suspension was spun down at 6,000 rpm to recover spheroplasts.Spheroplasts weregently resuspendedin 500μl BufferCand DNA was twice extracted with 500μl phenol:chloroform:isoamyl alcohol (25:24:1)solution.Aqueous layer was collected in a new 2ml microcentrifuge tube and DNA was precipitated with 1ml ethanol and 1/10thvolume of 3M sodium acetate (pH 5.2)by centrifugation at 13,000 rpm for 5 min. Pellet was resuspendedin 200 μl TE containing 0.3 μl of RNase Cocktail™and incubated at 37 ̊C for 30 min.After incubation, 300 μl additional TE was added and DNAwas re-precipitated withethanol and 3 M sodium acetateas described above. Pellet was washed with 70% ethanol anddried under air. DNA pellet was finally suspended in 100 μl TE and stored at -20 ̊C
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Protocol III(Spheroplast lysis method
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phenol:chloroform:isoamyl alcohol (25:24:1)was added to the tube and mixed thoroughly.Aqueous phase was collected after centrifugationat 12,000 rpm for 3 minand was transferred toanew 2 ml microcentrifuge tube.1 ml absoluteethanol was added to the aqueous phase and DNA was precipitated by centrifugation at 12,000 rpm for 8 minat 4 ̊C.DNA pellet was washed with chilled 70%ethanol and dried under air. DNA pellet was resuspendedin 50 μl TE containing 0.3 μl of RNase Cocktail™(Ambion®# AM2286)and incubated at 50 ̊C for 20 min. 200 μl additional TE was added to the above suspension and DNA was stored at -20 ̊C
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In this method of genomic DNA extraction,yeast cells werelysed by mechanical disruption with glass beads. Briefly, yeast cells were harvested after overnight growth in YPD medium, resuspendedin 500 μl waterand transferred toa2 ml microcentrifuge tube.Cells were pelleteddown at 10,000rpm for 1 min. Resulting supernatant was discarded and the pellet was resuspendedin 500 μl Buffer A. The tube was incubated at 65 ̊C for 15 min. After incubation, 500 μl ofphenol:chloroform:isoamyl alcohol (25:24:1) and 0.5 gm of acid-washed glass beads (Sigma # G8772) were addedto the tube. Cells were lysed by three cycles of high speed vortexing withintermittent ice breaksfor 45 secand pelleteddown at 12,000 rpm for 3 minat 4 ̊C.Uppermost aqueous phase was transferred to a 2 ml microcentrifuge tube,500 μl of
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Protocol II (Glass bead lysis method)
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This quick extraction method was used to isolate genomic DNA which was used as templateto amplify gene of interestor toverify the knock-out. C. glabratacells were grownovernight to saturation in 10 mlYPD medium at 30 ̊C.Cells were harvested at 4,000 rpm for 5 min, resuspendedin 400 μl Buffer Acontaining 50 mM Tris-HCl, 10 mM EDTA, 150 mM NaCl, 1%Triton X-100 and 1%SDSand weretransferred to a2 ml microcentrifuge tube. Equal volume ofphenol-chloroform solution was added to the abovesuspensionfollowed byvortexingfor 2-3 minand incubationat 42 ̊C for 30 minwithcontinuous agitation at 800 rpm on thermomixer (Eppendorf). Cell debris was removed bycentrifugation at 12,000 rpm for 5 minand aqueous fraction(~ 350 μl)was transferred to a new 2 ml microcentrifuge tube.0.3 μl RNaseCocktail™(Ambion® # AM2286) containing RNase A (500 U⁄ml) and RNase T1 (20,000 U⁄ml) was added and tubes were incubated at 37 ̊C for 30 min. DNA was precipitated with 2.5 volumesof chilled ethanol and 1/10thvolume of 3 M sodium acetate (pH 5.2).DNA pellet was washed with chilled 70%ethanol and semi-dried under air.Pellet was suspendedin 100μlTE (10 mM Tris-HCland 1 mM EDTA; pH 8.0)and stored at -20 ̊C.DNA concentration was determined by recordingabsorbance at 280 nmin Nanodrop (Nanodrop ND-1000, Thermo Scientific).
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Protocol
I (Quick genomic DNA isolation)
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Based on the subsequent use, DNA from C. glabratacells was extracted using three different methodologie
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Yeast genomic DNA isolation
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preparedin appropriate solvents, sterilizedby autoclaving or filtrationand stored at appropriate temperature
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For growth analysisof C. glabratastrains, a single colony from YPD or YNBagar mediumwas inoculated in appropriate liquid medium and incubated at 30 ̊C with shaking at 200 rpmfor 14-16 h. This overnight grown culture was used toinoculatetest medium to an initial OD600of 0.1to 0.3.Optical density/Absorbance of the cell suspensionwas measured using Ultraspec 2100 pro UV/visible spectrophotometer (Amersham Biosciences) at600nmat regular time-intervals up to a period of 96 h.Absorbance values were plotted with respect to time. Generation time of yeast strains wascalculated fromthe logarithmic (log) phase of cellgrowth. Growth profilesbetween 4 (t1)and 8 h(t2)time interval wereconsideredfor calculationof generation time usingfollowing formula. Generationtime(G)= (t2-t1) x {log (2)/ [log (Bf/Bi)]}G= Generation time in ht1=Initial timepoint taken for analysist2 = Final timepoint taken for analysisBf= Number of cells at time t2(calculated on the basis of OD600values, wherein1 OD600of C. glabratacorresponds to 2 X 107cells.)Bi= Number of cells at time t1(calculatedas mentioned above)Severalyeast strains used in this study were analysed for their susceptibility to variouschemical compounds,drugsand metal ions. For this purpose, stock solutions were
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Growth assayand measurementof generation time
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Bacterial strainEscherichia coli DH5αused for cloning purposewas revived on LB medium and grown at 37°C withcontinuous shaking at 200 rpm. LB medium was supplemented with appropriate antibiotics to growbacterial strains carrying plasmids. AnotherE. coli strain,BW23473,was used to rescue the Tn7transposon cassette from C. glabrataTn7insertion mutants. For plasmid DNA purification, bacterial strains were grown overnight in LB broth medium containingsuitable antibiotics
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C. glabratastrains were routinely grown either in rich YPD medium or synthetically-defined YNB medium at 30°C withcontinuous shaking at 200 rpm unless otherwise stated. In general, C. glabratafrozen glycerol stocks wererevivedonYPD medium by streaking and allowed to grow for 1-2 days. C. glabratastrainsharboringthe plasmid with URA3as selectable marker were revived onCAA medium.To prepare liquid cell culture, single colony of eachC. glabratastrainwasinoculated either in YPD or YNB broth mediumand grown for 14-16 h. C. glabratastrains streaked on plates were storedat 4°C fora maximum period of2 weeks
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Strains and culture conditions
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To isolate primary peritoneal macrophages, 6-8 week old BALB/c mice were injected with 3% (w/v) thioglycollate broth (0.55% dextrose, 0.05% sodium thioglycollate, 0.5% sodium chloride, 0.05% agar)intraperitonealy (I.P. 50 μl/g body weight). After five days of injection, mice were euthanized by CO2inhalationand peritoneal macrophages were harvested byflushing the peritoneal cavity (lavage) with 10 mlDMEM medium(Zhang et al., 2008)
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Isolation of primary (peritoneal) macrophages from BALB/c mice
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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Total RNA was isolated by TRIzol method using the manufacturer’s protocol. Briefly, medium was removed from culture dish and recommended amount of TRIzol wasadded directly on to the dish and kept at room temperature for 5 minutes for lysis of cells. The cellular homogenate was then transferred to a 1.5ml microcentrifuge tube. For each mlof TRIzol, 200μl of chloroform was added and tubes were shaken vigorously for 10 seconds to completely dissociate the nucleoprotein complexes, followed by vortexing for about 30 seconds. The mixture was kept for 3-5 minutes at room temperature and then centrifuged at maximum speed of 12,000 rpm for 10 minutes. The upper aqueous phase was transferred into a fresh micro centrifuge tube and RNA was precipitated by adding 500μl of iso-propanol. The RNA pellet was obtainedby centrifugation at 12,000 rpm for 30 minutes at 4°C. The pellet was washed with 1ml of chilled 70% ethanol followed by centrifugation at 12,000 rpmfor 5minutes. The supernatant was removed and the pellet air-dried for about 5 minutes. The pellet was resuspendedin 30-50μl RNase free deionisedwater and dissolved at 55ºC followed by quantificationusingnanodrop spectrophotometerfor further use.The RNA integrity was checked by evaluating the 18S and 28S rRNA signals by running 1μl of total RNA on denaturing agarose gel stained with ethidium bromide
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Total RNA isolation from cultured cells
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Themixture is incubated in a water bath at 37⁰C for 15 min and afterwards transferred on ice and 4μl of DNA loading buffer is added. The samples were then run on a polyacrylamide gel electrophoresis which had been pre-run for 30 min. Electrophoresis was carried out at 4⁰C for 3h till the bromophenol blue migrated to 2cm above the bottom of gel. The gel was taken out and kept on Whatman filter paper sheet and covered by saran wrap followed by drying in a gel dryer at 80⁰C for 1h under suction. The dried gel was exposed to phosphoimager screen by keeping in phosphoimager cassette overnight
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A binding reaction mixture was prepared by adding the following components to a microcentrifuge tube on ic
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Binding reaction
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Cells were seeded in replicates of five @ 3X103cells per wellinfive different 96well cell culture platesand grown in complete media. The method described earlier was slightly modified and followed (Gillies et al., 1986). After every 24h of seeding, one plate was stained with 0.2% crystal violet in 2% ethanolfor 15 minutestill 4thday i.e. 96h.One plate was stained just after the cells get attached to use as 0h time point. Excess dye was removed from the plates by washing with ample amount of water. Crystal violet dye incorporated in the cells was extracted using 0.1% SDS solution by shaking for 10 minutes on a shaker. Absorbance of the extracted dye was then determined at 570 nm in a spectrophotometer. The experiment was repeated at least three times and the average absorbance was plotted for each time point to generate a growth curve
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Cell growth Assay
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shodhganga.inflibnet.ac.in shodhganga.inflibnet.ac.in
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200 rpm in LBbroth supplemented with appropriate antibiotics (plasmid antibiotic marker). Cells were harvested by centrifugation at 12,000 g for 5 min. Plasmids were extracted using Qiagen plasmid miniprep ormidiprep kit following the manufacturer’s instructions. Concentration of the extracted plasmid DNAs was measured using spectrophotometer at 280 nm and stored at -20°C
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E.colistrains carrying plasmids were inoculated and grown overnight at 37°C and
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Plasmid DNA purification
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For growth analysis of Xanthomonasstrains, a loopful of bacterial colony was inoculated in appropriate broth medium and grown for 14-16 h. 0.2% of overnight grown culture was used to inoculate the test medium (for iron limitation, PS with 50 or 100 μM of 2,2’-dipyridyl, and for iron supplementation, different concentrations of either FeCl3or FeSO4was added). Cultures were transferred to a shaker incubator set at 28°C and 200 rpm. Absorbance of cultures was measured using Ultraspec 2100 pro UV/visible spectrophotometer (Amersham Biosciences)at 600 nm at regular time-intervals till 48 h. Absorbance values were plotted with respect to time and generation time was determined from the logarithmic (log) phase of bacterial growth using the following formula.G = Generation time (h)T1= Initial time point taken for analysisT2= Final time point taken for analysisNf = Absorbance at time T2(Final OD)Ni= Absorbance at time T1(Initial OD)
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Growth analysis and determination of generation time
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sg.inflibnet.ac.in sg.inflibnet.ac.in
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This method was used to isolate highly pure genomic DNA. Briefly, 10 ml overnight grownC. glabratacultures were spun downandwashed with 10 ml sterile water. Washed cells wereresuspended in500 μl sterile water and transferred toa1.5 ml microcentrifuge tube. Tubes were spundownat 4,000 rpm for 5 min, supernatant was discarded andcell pellet was resuspended in 500 μl of buffer containing 100 mM EDTA and 5% β-mercaptoethanol and incubatedat 42°C for 10 min. Post incubation, cells were spun down at 4,000 rpm for 5 min and resuspended in freshly prepared Buffer B. To this, one tip-full of lyticase (Sigma, L4025) was added and incubated at 37°C for 1 h.After incubation, spheroplasts were collected by spinning downtubes at 6,000 rpm for 5 min, supernatant was discarded and the pellet was resuspended in 500 μl of Buffer C. DNA was extracted twice with 500 μl of PCI (25:24:1) solution and the aqueous layer was transferred toa new1.5 ml microcentrifuge tube. To this, 2.5 volume of absolute ethanol and 1/10thvolume of 3 M sodium acetate (pH 5.3) wereadded. Tubes were spundownat 13,000 rpm for 10 min, DNA pellet was resuspended in 200 μl of 1X TE buffer containing0.3 μl of RNase cocktail (Ambion) and incubated at 37°C for30 min. DNA was precipitated again by adding absolute ethanol and sodium acetate as mentioned above. DNA pellet was washed once with 70% ethanol, centrifuged at 13,000 rpm for 10 min, air-dried at room temperature and was resuspended in 100-200 μl of 1X TE buffer by gently tapping the tube. DNAwas stored at -20°C until use
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Spheroplast lysis method
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This method was used to isolate highly pure genomic DNA. Briefly, 10 ml overnight grownC. glabratacultures were spun downandwashed with 10 ml sterile water. Washed cells wereresuspended in500 μl sterile water and transferred toa1.5 ml microcentrifuge tube. Tubes were spundownat 4,000 rpm for 5 min, supernatant was discarded andcell pellet was resuspended in 500 μl of buffer containing 100 mM EDTA and 5% β-mercaptoethanol and incubatedat 42°C for 10 min. Post incubation, cells were spun down at 4,000 rpm for 5 min and resuspended in freshly prepared Buffer B. To this, one tip-full of lyticase (Sigma, L4025) was added and incubated at 37°C for 1 h.After incubation, spheroplasts were collected by spinning downtubes at 6,000 rpm for 5 min, supernatant was discarded and the pellet was resuspended in 500 μl of Buffer C. DNA was extracted twice with 500 μl of PCI (25:24:1) solution and the aqueous layer was transferred toa new1.5 ml microcentrifuge tube. To this, 2.5 volume of absolute ethanol and 1/10thvolume of 3 M sodium acetate (pH 5.3) wereadded. Tubes were spundownat 13,000 rpm for 10 min, DNA pellet was resuspended in 200 μl of 1X TE buffer containing0.3 μl of RNase cocktail (Ambion) and incubated at 37°C for30 min. DNA was precipitated again by adding absolute ethanol and sodium acetate as mentioned above. DNA pellet was washed once with 70% ethanol, centrifuged at 13,000 rpm for 10 min, air-dried at room temperature and was resuspended in 100-200 μl of 1X TE buffer by gently tapping the tube. DNAwas stored at -20°C until use
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Spheroplast lysis method
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C. glabratastrains were routinely grown in rich YPD medium or synthetically defined YNB medium, or YNB medium supplemented with CAA, unlessstatedotherwise.To obtain overnight grown liquid cultures, C. glabratacells were inoculated in appropriate medium and incubated at 30°C under constant agitation (200 rpm) to maintain proper aeration.To revive the frozenstocks,about one tipfull of frozen culture was streaked either on YPD-agar or on CAA-agar medium. In general, frozen stocks of C. glabratastrains were revived on YPD-agar medium.However,C. glabratastrains harbouring plasmidscontainingURA3as a selectable marker were revived on CAA-agar medium. After streaking, plates were allowed to grow for 24-48 h at 30°C and were stored at 4°C for a maximum period of two weeks. For long term storage, freezer stocks of C. glabratastrainswere prepared in 15% glycerol and stored at -80° C.Escherichia colistrain DH5αwas revived on LB-agar medium from frozenstock and incubated at 37°C for 14-16 h. DH5α strainwas used for transformation purpose and maintaining plasmids. Bacterial strains harbouring plasmids containing selection markerswere revived on LB-agar medium supplemented with appropriate antibiotics.Bacterial liquid cultures were either grown in LB broth or LB broth containing suitable antibioticsand incubatedin a shakerincubator set at 37°C, 200 rpm for 14-16 h. For preparation of bacterial frozenstocks, 1 ml overnight grown bacterial culture was added to500 μl of 50% glycerolto obtain final concentration of ~16 % glyceroland stored at -80°Cuntil use
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Strains and culture conditions
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For cryopreservation of THP-1 and Lec-2 cells, 5-6 million cells wereresuspendedin 0.5 ml of eithercommercially procuredcell preservation medium from GIBCO(12648010)or complete medium supplemented with 10 % fetal bovine serum and 10 % DMSO.Cells were initially kept inanisopropanol bath and werelatertransferred to -70°C freezer. After 2-3 days, frozencells were transferred to liquid nitrogen container till further use. To revive the cells, frozenstockswere taken out of the liquid nitrogen container and immediately transferred to water bath set at 37°Cfor thawing. When freezing medium has thawed completely, cells were transferred to a 100 mm cell culture dishcontaining 12 ml completemedium and incubated under tissue culture conditions at 37°C and 5% CO2for 12 h. Afterincubation, medium was replaced by 12 ml fresh pre-warmed medium and incubated under tissue culture conditions till they reached 70-80% of confluencebefore splitting
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Cryopreservation and revival of cell lines
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