a weapon — say by sabotaging the pollinators that support agriculture, or by altering the genes of innocuous wild insects so they could transmit disease

Could a gene drive stop one virus only to open the way for another, more virulent one? Could it jump from one species to a related one? What would be the environmental effects, if any, of altering the genes of entire species? How about eliminating a species entirely?

Besides combating malaria, gene drives could be used to alter, or even eliminate, other disease-causing insects, from the sand flies that transmit leishmaniasis to ticks that carry Lyme disease in the United States.

power of the people is not only limited to the right of vote, but it extends further and provides us the right to participate in a democratic system by observing, suggesting and discussing, contemplating, questioning, negotiating and dissenting its system or function in various circumstances

CES (combinatorial enhancer solution). 5X CES = 2.7 M betaine, 6.7 mM DTT, 6.7% DMSO, and 55 ug/ml BSA

capable of checking multiple annealing temperatures at a time

increasing the magnesium concentration, which improves amplification

but the 5’ end is more important

relative granulocity/internal complexity (Side Scatter - SSC)

relative size (Forward Scatter - FSC)

We must stop building new nuclear power plants, and find a real solution to our existing nuclear waste problem.

More broadly, we hope that others, especially the hundreds of new startups in synthetic biology, consider sharing pre-competitive ideas, methods, tools, etc. We think the community will be stronger as a result.

we usually need 400-1200 colonies, it’s still easier and faster to do this manually than by colony picker. Also, colony pickers typically cost >$100K and don’t seem appropriate for our scale. 

manually analyzing the data was about as painful as waiting for the results

OCTOPUS, a light-weight, cost-effective, and robust method for full-plasmid sequence verification using next-generation sequencing

Biosensing intracellular concentrations of metabolites can provide an efficient high-throughput screen of hyperproducing strains.

Chemical inducers such as carbon sources, metabolites, and antibiotics, environmental signals such as light, pH, oxygen, or temperature, and autoregulatory quorum-sensing molecules can all be sensed by TFs

It boils down to priors: do we have reasons to expect large variance in opaqueness? Do we have reason to expect low variance in opaqueness?

A final word: when we do not understand something, it does not look like there is anything to be understood at all - it just looks like random noise. Just because it looks like noise does not mean there is no hidden structure.

because the receptor both activates and deactivates the internal signal, its concentration cancels out in the equilibrium expression

we were far in advance of Westerners in science and technology at that time.  Today we are far behind them, so what happened?  Why did we not have an Industrial Revolution?  Why did we lag behind?  This is known as Needham’s question or Needham’s Grand Question

In India, on the other hand, there is tremendous diversity, because whichever group of immigrants came into India brought in their own culture, their religion, their language etc.

Nevertheless, fierce Carter administration pressure mounted for him to abdicate.

Today, over 40% of the world’s people speak a mother tongue descended from the language of those nomads of the steppe.

If we reunite, we can pool in our resources and overcome these problems in 15-20 years

they do not want another China

communalism is an artificially-created phenomenon, and can easily be suppressed by a strong secular government.

Interactions between Mycobacterium tuberculosis (Mtb) and human (players) are often included in the Mtb’s strategies to invade host responses, to replicate and persist within the host,

Borate, which is present in LB and SB, causes reversible crosslinks with DNA, reducing the separation of larger DNA fragments unless low % gels are made of high-strength agarose

use of the strong UAAU signal in highly expressed genes and for the occurrence of the weaker UGAC signal at several recording sites.

suggestive of protein extension, especially at UGA codons, which rely exclusively on the reduced function RF2 variant of the K-12 strain for termination

Since capitalists make money from every hour of workers’ labor, they will get increasingly rich over time, while workers won’t because they’re too busy making money for capitalists

the rich pocket, rather than reinvest, their tax cuts

should reject the influence of both liberal capitalism and communism, ideas that inspired the revolutionary slogan "Neither East, nor West – Islamic Republic!"

Religious conflict in any form is often far more impervious to pragmatic solutions, and can prove more dangerous than national conflicts.

A single transformant may have a mutation at a low level that will eventually sweep through the population

promoter mutations remove the metabolic load at both the transcriptional and translational levels

in the normal MG1655 strain that does not overproduce LacI

a few simple design principles: high expression of genetic circuits comes with the cost of low evolutionary stability, avoid repeated sequences, and the use of inducible promoters increases stability. Inclusion of an antibiotic resistance gene within the circuit does not ensure evolutionary stability.

Engineering as a practice has not, however, been successful in such endeavors as controlling the weather or avoiding natural disasters, due largely to the scale, complexity and uncertainty inherent to those problems. So we must ask: is the conventional paradigm of engineering appropriate for biology?

CRISPRi-ME prevents evolutionary failure of a burdensome plasmid in E. coli.

SDS in loading buffer may contribute to band smearing in precast GelRed® gels. If this occurs, we recommend using the post-staining protocol

50 μg/ml RNase (ThermoFisher #EN053) freshly added. 2 ml of lysis buffer

deep-well plates, require a faster shaking speed for proper aeration

Composition of H15 growth medium

valorization of waste chemicals accumulating in industry is one of the pillars of the circular economy and the 4th Industrial Revolution

we recommend calibrating OD using serial dilution of silica microspheres, which readily produces highly precise calibration (95.5% of teams having residuals less than 1.2-fold), is easily assessed for quality control, and as a side effect also assesses the effective linear range of an instrument.

Bacteria are less likely to develop resistance against a pro-drug as it becomes active only after getting inside the bacteria. The active components formed from the pro-drug are potent and short-lived, thus not giving the bacteria sufficient time to develop resistance.

which ends up being much less efficient

“death phase,” where at least 99% of the cells in the culture lose viability

E. coli in 2xYT broth which takes faster (8 h) to grow compared to LB

this system enables longer duration production, and could be readily applied to burdensome or toxic products not readily produced in bacteria

Application of synthetic biology is limited by the capacity of cells to faithfully execute burdensome engineered functions in the face of Darwinian evolution

sequential lineage tracing studies aimed at unraveling the relationships between cellular precursors and mature cell types

To add a data mask so you can refer to variables in a data frame as if they are variables in an environment.

plasmid-based circuits suffer from multiple limitations: high intercellular variation in gene expression, genetic instability from random partitioning of plasmids during cell division, and plasmid loss in environments for which antibiotic use could disrupt native microbial communities or is economically infeasible

, science proceeds by the falsification and refinement of hypotheses. Thus, for most papers, the only way is down.

despite Blatt’s carefully worded insinuations, PubPeer does not allow “hearsay”, “allegations” or invite “innuendo” (and we aim to act on all reports of such comments)

authors, journals and institutions are all unquestionably exposed to conflicts of interest when it comes to correcting problems

in much of biology, readers have to trust the authors to describe their experiments accurately, and there are many more opportunities for mistakes and dishonesty

alleging their negative appraisals of his work had resulted in a university rescinding a job offer

Commenting on a scientific paper, in particular when the comments are not positive, is risky business for academics

auxotrophic for specific amino acids

That means gram-negative bacteria cannot change the BamA protein without losing their ability to infect.

Reference values for the Z-position

5 nM fluorescein in 0.01 M NaOH was measured in black 96-well microplates

(a+b+c)^2 - a:b is identical to a + b + c + b:c + a:c

enquo() uses some dark magic to look at the argument, see what the user typed, and return that value as a quosure

landscape vs. portrait.

Ina Schuppe Koistinen, Abhishek Krishnagopal, Sangeetha Kadur, Pooja Gupta etc gave me the inspiration to do what I wanted to do. Along the way I got exposed to more art and science creators like Gemma Anderson, Monica Zoppe, Drew Barry, Ina S. Koistinen, Christian Sardet, Sandra Black Culliton, Amanda Phingbodhipakkiya

we present an overview of our current understanding of these rules for the genetic manipulation of prokaryotic microbes and the available genetic tools to expand our ability to genetically engineer nonmodel systems

s used fluorescein-labelled oligonucleotides as our probe for DNA delivery

required removal of salts results in osmotic stress - particularly challenging for a notoriously temperamental marine bacterium like Prochlorococcus

the 6-month multi-step procedure is vulnerable to user variability

This cell is the simplest photosynthetic “machine” designed by nature – an attractive foundation for manipulation

small size (hence high surface/volume ratio), which enhances its ability to compete for limiting nutrients

Such projects are not suitable for graduate students or post-docs because of the high risk involved, nor are they easily funded

genetic transformation protocols requires tedious trial and error, and methods developed for one strain are often unsuccessful in close relatives

To avoid the pursuit of unproductive paths, we report here what has not worked in our hands, as well as our progress developing a method to screen the most efficient electroporation parameters for optimal DNA delivery into Prochlorococcus cells

HGT typically adds new catabolic routes to microbial metabolic networks. This increases the chance of new metabolic interactions between bacteria

key attributes needed to produce a worthy PhD thesis are a readiness to accept failure; resilience; persistence; the ability to troubleshoot; dedication; independence; and a willingness to commit to very hard work — together with curiosity and a passion for research

key challenge is to quantify the functional roles of bacterial taxa in nature to understand how the properties of ecosystems change over time or under different environmental conditions

Hemicellulase activity was elevated in pairwise mixtures of communities that placed interacting phylotypes together (interactions, n = 9 mixtures) but not in communities that did not place interacting phylotypes together (no interactions, n = 56 mixtures)

For F-1 and J-1 students, on-campus work is limited to part-time (20 hours or less per week) during the fall and spring semesters when school is in session

tools described here can be used to mimic complex expression patterns, such as the ones found for pneumococcal virulence factors, paving the way for in vivo investigations of the importance of gene expression control on the pathogenicity of S. pneumoniae.

It is challenging to study how pneumococci control virulence factor expression, because cues of natural environments and the presence of an immune system are difficult to simulate in vitro

When you present information visually (using slides, a poster, video, handout, etc.), you must provide a full written citation.

these two highly active enzymes were functionalized with an affinity binding motif through the genetic fusion of a carbohydrate binding module (CBM) from Cellulomonas fimi with specificity to cellulose (CBM2a)

optical nanostructures, surface enhanced Raman spectroscopy, flow cytometry, etc.) have shown promise as sensitive detection methods, they typically process only small, relatively clean samples. The true bottleneck to rapid detection methods remains the separation of a target analyte from a large complex matrix.

EPA Method 1603 is an approved drinking water assay that quantifies generic E. coli

most probable number (MPN) method. The MPN is determined by serial diluting the water sample in triplicate or pentaplicate followed by incubation in selective growth media

single copy phylogenetic marker gene

known to introduce biases in composition estimates due to, for instance, variations in 16S rRNA gene copy numbers per genome

unequal efficiencies of PCR-primers in different species

Students who are less exposed to what we propose here may resist at first, simply because it is unfamiliar, but it is our experience that, overall, students will embrace and appreciate these modifications to the way assessments are conducted.

opening new paths for side effect control

Susceptibility to antibiotics and human-targeted drugs correlates across bacterial species

EDTA-extractable fraction

we define the physiological and environmental parameters that mediate the transition from cooperation to competition

transient events

Illustration by Sébastien Thibault

SDS affects the oligomerization state of Aβ42 oligomers, thus providing flawed information on their order and distribution.

except for those that catalyze irreversible reactions in the TCA, such as citrate synthase

molecular explanations of whether such shifts represent cause or effect of the disease itself are limited

Graphical abstract

includes creation of innovative solutions for bio energy, resource recovery, and emerging public health concerns by leveraging synthetic or molecular biology tools, novel biological systems (genetic circuits, enzymes, genetically engineered microbes), fundamental biological and chemical concepts, artificial intelligence, and big data science, as well as collaborations in Computer Science, Public Health, Plant Biology, or related fields.

A biofilm was prepared

biofilm

values measured by using luminous E. coli had tendency of about 30–40% lower than that of BOD5, it could be observed an apparent correlation between the two values

bioluminescence was observed during the incubation time between 90 and 150 min in the presence of a sole carbon source such as glucose, acetate, l-glutamate and BOD standard solution (GGA solution)

is dosed with seed microorganisms and stored for 5 days in the dark room at 20 °C to prevent DO production via photosynthesis

The generally lower values in the U.S. derive from the much greater water use per capita than in other parts of the world

not suitable for process control in wastewater treatment and the real-time monitoring of water environments, such as rivers, streams, ponds, and ground water

is independent of the general recombination pathway

it then moves in a directed path through the pore space, a process we call hopping

Phase variation is often mediated by the presence of highly mutagenic simple tandem DNA repeats, and genes containing such sequences can be easily identified

ఎప్పటికైనా Knowledge Centric Value Based Education రావాలని కోరుకుందాం

observations are consistent with a previous report showing that AHLs preferentially partition to the biofilm, reaching concentrations 600-fold in excess of the signal concentration in the surrounding bulk liquid medium

the best way to correct for the analyte signal suppression or enhancement is to co-elute a stable isotope labelled (SIL) analogue of the analyte

We also show how our toolbox can be used to deploy the FBP in planta to build auto-luminescent reporters for the study of gene-expression and hormone fluxes

We tested a broad range of Enterobacteriaceae conjugative plasmids for their sensitivity to the growth stage of the donors and identified three distinct regulation types.

indicate that even low concentrations of just a single type of antibiotic leads to resistance to multiple classes of antibiotics.

Overall, the low contamination level of antibiotics and high absolute abundance of ARGs indicated that ARGs previously introduced to an environment can self-amplify and persist in the environment

suggesting that STPs have become an important source of contamination for their receiving rivers

Additionally, the concentrations of antibiotics and the abundance of ARGs might increase after the sewage treatment process.

Perhaps we ultimately need to be prepared to accept less standardised and slightly more expensive food in order to accommodate less intense and more diverse agriculture. You might never be quite sure what to expect when you peeled a banana, but the result could be a more robust and sustainable food system without a major crisis every few decades.

With this approach, neurons that show E-SARE–driven expression in response to stimuli are permanently labeled by the fluorescent protein during the time window specified by the drug

Expression of a drug-inducible Cre recombinase downstream of E-SARE enabled imaging of neuronal populations that respond to monocular visual stimulation and tracking of their long-distance thalamocortical projections in living mice

The feedback loop permits sustained induction of recombinant proteins without massive quantities of inducer.

We have demonstrated that small RNAs can tightly repress their target genes when their synthesis rate is smaller than some threshold, but have little or no effect when the synthesis rate is much larger than that threshold

a threshold-linear response with a tunable threshold, a robust noise resistance characteristic, and a built-in capability for hierarchical cross-talk.

In particular, small RNAs are shown to establish a threshold for the expression of their target, providing safety mechanism against random fluctuations and transient signals. The threshold level is set by the transcription rate of the small RNA and can thus be modulated dynamically to reflect changing environmental conditions.

in the absence of tamoxifen, it exhibits some activity

A technique common in rodents is the use of Cre recombinase lines that are inducible at specific developmental time points (Figure 3b). The most common form of inducible Cre is CreERT2, which contains a modified estrogen receptor binding domain that prevents Cre from entering the nucleus in the absence of a ligand

strong promoters capable of driving expression of microbial opsins or fluorescent proteins in specific populations can exhibit leaky expression elsewhere. This low-level leak may be virtually undetectable as light responsiveness or fluorescence but can be a serious issue when expressing Cre recombinase.

Our analysis demonstrates that its structure is shaped more by stochasticity than selection.

To investigate how ciprofloxacin 35resistance is affected by the presence of metals,

creating improved technologies for large-scale recordings of neural activity in the live brain is a crucial goal in neuroscience

new toolkits for chronic labeling of active ensembles will provide a much awaited experimental basis to interrogate various aspects of neuronal circuits underlying long-term plastic changes of the brain, such as during nervous system development, during establishment of long-lasting remote memory over months, or in association with age-related neuronal changes over several years.

new direction of functional labeling involves conversion of transient expression from activity-dependent promoters into a permanent labeling based on tamoxifen-dependent recombinases

presence of the donor strain on the surface of the mutant selection plates, prevents the use of these plates for replica plating

In soil, bacteria tend to live in a state of dormancy due to prevailing oligotrophic conditions, which would not be particularly favorable for the development of competence

bacteria generally express genes only when and where needed, and thus do not readily reveal their pathogenic armament outside of infected tissues

This gene fusion approach will allow us to assay the induction of gene expression in as few as one cell

causes of microbial ‘uncultivability’ are numerous

The stability of susceptibility patterns allowed the antibiograms to be used as aids in the preliminary differentiation of these organisms.

regulate gene expression, typically by occluding or exposing regulatory features, such as ribosome binding sites (RBSs) in the case of translation or intrinsic terminator hairpins in the case of transcription

improvement of soil health should be a priority agenda in India’s agricultural policy. We need steps to check wind and water erosion of soils. We need innovative technologies to minimise physical degradation of soils due to waterlogging, flooding and crusting. We need to improve the fertility of saline, acidic, alkaline and toxic soils by reclaiming them

Indian soils are poor in organic matter content. About 59% of soils are low in available nitrogen; about 49% are low in available phosphorus; and about 48% are low or medium in available potassium. Indian soils are also varyingly deficient in micronutrients, such as zinc, iron, manganese, copper, molybdenum and boron

In culture conditions that enhance cell-to-cell contact, conjugation rates approach 100% with the cis-acting plasmid

wastewater treatment plants are hotspots for the release of antibiotics, and transmission of diverse antibiotic resistance bacteria (ARB) as well as ARGs into various environments

Recent findings have indicated that most ARGs could not be efficiently removed by traditional anaerobic digestion treatment

Detection of AHL by LC-FTMS was much more sensitive than by TLC bioassay, because TLC bioassay was implied to be affected by the presence of quorum quenching molecules in activated sludge.

Biofilms grown under higher shear were more rigid and had a greater yield shear stress than those grown under lower shear.

Because growth conditions (i.e., fluid dynamics and nutrient composition) can also have a profound effect on when QS is important,(71-75) there is a need to study biofilm formation and QS of BNR bacteria under various potential operating conditions.

Many QS-controlled genes relate to biofilm formation and function and may be important for some water and wastewater treatment biofilms