CRISPR	Clustered Regularly Interspaced Short Palindromic Repeat
Cas	CRISPR-Associated
PAM	protospacer adjacent motif
gRNA	guide-RNA
DSB	DNA double-strand break
NHEJ	non-homologous end-joining
Sp	Streptococcus pyogenes
Cj	Campylobacter jejuni
KO	knockout
KI	knock-in
ssODN	single-strand oligodeoxynucleotide
Chk2	checkpoint kinase 2
DMEM	Dulbecco’s modified Eagle’s medium
FBS	fetal bovine serum
eCG	equine chorionic gonadotropin
hCG	human chorionic gonadotropin