Archaeoglobus fulgidus	-	684126	
Archaeoglobus fulgidus	SepCysS1; SepCysS1	675447	
Archaeoglobus fulgidus	two genes	676784	
Escherichia coli	-	722261	
Methanocaldococcus jannaschii	-	689145, 722286, 722799, 728697, 743961, 745864	
Methanocaldococcus jannaschii	gene Mj1678 or pscS	677118	
Methanocaldococcus jannaschii DSM 2661	-	722799, 728697, 743961, 745864	
Methanococcoides burtonii	two genes	676784	
Methanococcus maripaludis	-	684126	
Methanococcus maripaludis	gene pcsS	677118	
Methanopyrus kandleri	-	676784	
Methanosarcina mazei	-	687743	
Methanospirillum hungatei	-	676784	
no activity in Methanobrevibacter smithii	-	684126	
no activity in Methanosphaera stadtmanae	-	684126