4.4.1.1	cystathionine gamma-lyase	-	
4.4.1.10	cysteine lyase	-	
4.4.1.13	cysteine-S-conjugate beta-lyase	-	
4.4.1.15	D-cysteine desulfhydrase	-	
4.4.1.3	dimethylpropiothetin dethiomethylase	-	
4.4.1.36	hercynylcysteine S-oxide lyase	-	
4.4.1.17	Holocytochrome-c synthase	-	
4.4.1.B1	holocytochrome-c1 synthase	preliminary BRENDA-supplied EC number	
4.4.1.2	homocysteine desulfhydrase	-	
4.4.1.38	isethionate sulfite-lyase	-