Correction to: Nature https://doi.org/10.1038/s41586-019-0875-2

Published online 23 January 2019

In Extended Data Fig. 2 of this Letter, the tyrosinase guide RNA sequence in the top panel was incorrectly annotated such that it was shifted 8 nucleotides to the left to align with a neighbouring protospacer adjacent motif (PAM) site. The error had no consequence for the purpose of communicating the genotypes of offspring of Rosa26-cas9 and H11-cas9 breeding strategies. The guide RNA sequence was correctly presented in the Supplementary Methods and in Supplementary Fig. 2. Extended Data Fig. 2 has been corrected online. We would like to thank the reader who brought this to our attention.