4.2.1.22	Beta-thionase, CBS, CDCP2, CNNM2, Cys4, CysB, cystathionine beta synthase, cystathionine beta-synthase, cystathionine beta-synthase domain-containing protein, cystathionine-beta-synthase, Cysteine synthase, hCBS, Hemoprotein H-450, Methylcysteine synthase, osmoprotectant transporter OpuC, PF1953, PH0267, Serine sulfhydrase, Serine sulfhydrylase, Serine sulphhydrase, TA0289, TM0935, TV1335, yCBS	-	
4.2.1.22	ytCBS	a truncated form of CBS comprising the catalytic core is used for mutational analysis	
4.2.1.22	EC 4.2.1.21	formerly	
4.2.1.22	CBS424	inactive form of CBS	
4.2.1.22	LbrM.17.0230	locus name