Fig. 1: Maximum-likelihood phylogeny of Cas13 proteins and their distribution across the bacterial tree of life.
From: Broad-spectrum CRISPR-Cas13a enables efficient phage genome editing
The four known subtypes, Cas13a–d, each form their clade (inner track) with a skewed distribution across bacterial taxa (outer track). A Vibrio cholerae Cas9 (UIO88932.1) was used as the outgroup. Cas13 subtypes and microbial taxa that encode Cas13 are denoted in the colour bar.
