1.14.14.13	4-(gamma-L-glutamylamino)butanoyl-[BtrI acyl-carrier protein] monooxygenase	butirosin biosynthesis	-	-	
2.3.2.19	ribostamycin:4-(gamma-L-glutamylamino)-(S)-2-hydroxybutanoyl-[BtrI acyl-carrier protein] 4-(gamma-L-glutamylamino)-(S)-2-hydroxybutanoate transferase	butirosin biosynthesis	-	-	
4.1.1.95	L-glutamyl-[BtrI acyl-carrier protein] decarboxylase	butirosin biosynthesis	-	-	
4.3.2.6	gamma-L-glutamyl-butirosin B gamma-glutamyl cyclotransferase	butirosin biosynthesis	-	-	
6.2.1.39	[butirosin acyl-carrier protein]-L-glutamate ligase	butirosin biosynthesis	-	-