Status	Description	Organism	Genes	References
	carboxyethyl-arginine beta-lactam-synthase	Anoxybacillus flavithermus	GHEO-262
	LexA repressor	Brucella ceti	G10NO-1895
	LexA repressor	Brucella melitensis	GJOX-1119
	β-lactam synthetase	Salinispora pacifica	G16BO-1308
	carboxyethyl-arginine beta-lactam-synthase	Streptomyces avellaneus	G16WU-5764
	putative beta-lactam synthetase	Streptomyces cattleya	GJCM-6806
	asparagine synthase (glutamine-hydrolyzing)	Saccharomonospora viridis	GHAV-3256