1.1.2.4	Ca2+	inhibitory	389625	
1.1.2.4	Co2+	restores activity after inhibition with o-phenanthroline	389626	
1.1.2.4	Cu2+	rapid inactivation, can be restored by addition of dithiothreitol	389628	
1.1.2.4	Fe2+	restores activity after inhibition with o-phenanthroline	287801	
1.1.2.4	ferricyanide	can substitute for cytochrome c	389624, 389625, 389626, 389628, 389629, 389633	
1.1.2.4	ferricyanide	not suitable as electron acceptor	287801	
1.1.2.4	Mg2+	inhibitory	389625	
1.1.2.4	Mn2+	restores activity after inhibition with o-phenanthroline	287801	
1.1.2.4	Zn2+	required for activity	389628	
1.1.2.4	Zn2+	restores activity after inhibition with o-phenanthroline	389626	
1.1.2.4	Zn2+	very tightly bound to enzyme	287801, 389623