1.12.98.3	Co2+	hydrogenase D	440297	
1.12.98.3	Fe	enzyme contains FeS clusters	440300	
1.12.98.3	Fe	trace amounts	440297	
1.12.98.3	Ni2+	-	440298	
1.12.98.3	Ni2+	enzyme contains a redox-active Ni2+ ion	440300	
1.12.98.3	Ni2+	probably in trace amounts	440297	
1.12.98.3	Zn2+	-	440298	
1.12.98.3	Zn2+	hydrogenase A, 15% acid labile Zn2+	440297