3.1.3.33	CoCl2	divalent metal required, 30% the rate observed with MgCl2	81080	
3.1.3.33	MgCl2	divalent metal required	81080	
3.1.3.33	MnCl2	divalent metal required, 60% the rate observed with MgCl2	81080	
3.1.3.33	additional information	no cleavage in absence of divalent metal ion	81080