Evolutionary classification of CRISPR-Cas systems: a burst of class 2 and derived variants.
Nat Rev Microbiol. 2020 Feb;18(2):67-83. doi: 10.1038/s41579-019-0299-x. Epub 2019 Dec 19.
Nat Rev Microbiol. 2020.
PMID: 31857715
Free PMC article.
Review.