3.4.21.92	Ca2+	poor substitute for Mg2+	29858, 29860	
3.4.21.92	Mg2+	ClpA degrades large proteins down to short peptides of 7 to 10 amino acids, the process requires both Mg2+ and ATP hydrolysis	653260	
3.4.21.92	Mg2+	optimal concentration: 5.1 mM	29860	
3.4.21.92	Mg2+	proteolytic activity of ClpAP is dependent on, concentrations higher than about 30 mM are inhibitory	29858	
3.4.21.92	Mn2+	can partially substitute for Mg2+	29860	
3.4.21.92	Zn2+	poor substitute for Mg2+	29858