RNA-triggered cell killing with CRISPR–Cas12a2

Selectively eradicating target cells on the basis of their genetic or transcriptional identity remains important in basic research, medicine, biotechnology and agriculture1,2,3. For applications involving bacteria, CRISPR nucleases offer promising options due to their ability to enact RNA-guided counterselection4,5,6,7; however, using these same nucleases for counterselection in eukaryotes has proven much more restrictive8,9,10,11,12,13,14.