eLife assessment
Russel et al. study and reveal compelling evidence for potential sequence-based factors that may drive VDJ trimming, a mechanism involved in VDJ recombination that shapes adaptive immune repertoire generation. The work is based on a rigorous statistical comparison of logistic regression models to reveal the role and function of cutting enzymes in shaping T- and B-cell receptor diversity. It could provide fundamental new insights into these processes with some claims being currently incomplete.