1.14.99.50	gamma-glutamyl hercynylcysteine S-oxide synthase	ergothioneine biosynthesis I (bacteria)	-	
2.1.1.44	L-histidine Nalpha-methyltransferase	ergothioneine biosynthesis I (bacteria)	-	
3.5.1.118	gamma-glutamyl hercynylcysteine S-oxide hydrolase	ergothioneine biosynthesis I (bacteria)	-	
6.3.2.2	glutamate-cysteine ligase	ergothioneine biosynthesis I (bacteria)	-