6.3.1.20	Ca2+	may substitute for Mg2+, LPL-B	664920	
6.3.1.20	Co2+	may substitute for Mg2+	663919	
6.3.1.20	Co2+	may substitute for Mg2+, both LPL-A and LPL-B	664920	
6.3.1.20	Cu2+	may substitute for Mg2+, LPL-A	664920	
6.3.1.20	Fe2+	may substitute for Mg2+	663919	
6.3.1.20	Fe2+	may substitute for Mg2+, LPL-B	664920	
6.3.1.20	Fe3+	may substitute for Mg2+, LPL-B	664920	
6.3.1.20	Mg2+	Km-value 0.15 mM	663919	
6.3.1.20	Mg2+	required	744699, 745964, 746406	
6.3.1.20	Mg2+	required, both LPL-A and LPL-B	664920