
RNA-guided mutagenesis in zebrafish embryos. (A,B) Target sequences (upper) and RGEN-induced indels detected by T7E1 assays (lower). The Cas9 protein–sgRNA complex was microinjected into one-cell-stage embryos with concentrations of 1 ng, 4 ng, or 8 ng per embryo. (C) Time courses of Cas9 protein:sgRNA and Cas9 mRNA:sgRNA injection into embryos during early development. Arrows indicate bands cleaved by T7E1. (hpi) Hours post-injection.











