Addendum to: Nature Communications https://doi.org/10.1038/s41467-021-24454-5, published online 9 July 2021

During the peer review of this Article, a related work reporting the discovery and engineering of small SlugCas9 nucleases was published in Nucleic Acids Research ‘Discovery and engineering of small SlugCas9 with broad targeting range and high specificity and activity’.

Hu Z. et al. Discovery and engineering of small SlugCas9 with broad targeting range and high specificity and activity, Nucleic Acids Research, Volume 49, Issue 7, 19 April 2021, Pages 4008–4019.