RT Journal Article SR Electronic T1 CrispRVariants: precisely charting the mutation spectrum in genome engineering experiments JF bioRxiv FD Cold Spring Harbor Laboratory SP 034140 DO 10.1101/034140 A1 Helen Lindsay A1 Alexa Burger A1 Anastasia Felker A1 Christopher Hess A1 Jonas Zaugg A1 Elena Chiavacci A1 Carolin Anders A1 Martin Jinek A1 Christian Mosimann A1 Mark D. Robinson YR 2015 UL http://biorxiv.org/content/early/2015/12/10/034140.abstract AB CRISPR-Cas9 and related technologies efficiently alter genomic DNA at targeted positions and have far-reaching implications for functional screening and therapeutic gene editing. Understanding and unlocking this potential requires accurate evaluation of editing efficiency. We show that methodological decisions for analyzing sequencing data can significantly affect mutagenesis efficiency estimates and we provide a comprehensive R-based toolkit, CrispRVariants, that resolves and localizes individual mutant alleles with respect to the endonuclease cut site. CrispRVariants-enabled analyses of newly generated and existing genome editing datasets underscore how careful consideration of the full variant spectrum gives insight toward effective guide and amplicon design as well as the mutagenic process.