2.7.7.23	Ca2+	-	674815	
2.7.7.23	Ca2+	2 mM. Activation of UDP-N-acetylglucosamine diphosphorylase activity in the order of decreasing effectiveness: Mg2+, Zn2+, Ca2+, Co2+, Mn2+. No activity is detectable without a divalent cation	725308	
2.7.7.23	Ca2+	activates	756049	
2.7.7.23	Ca2+	Ca2+ shows similar enhancement like Mg2+	674815	
2.7.7.23	Ca2+	no activity is detectable when a divalent cation is removed from the reaction buffer. The order of effectiveness of metal ions on GlcNAc-1-P UTase activity is Mg2+ > Zn2+ > Ca2+ > Co2+ > Mn2+, which is different from that of its Glc-1-P TTase activity, Co2+ > Mn2+ > Mg2+ > Zn2+ > Ca2+	748123	
2.7.7.23	Co2+	2 mM. Activation of UDP-N-acetylglucosamine diphosphorylase activity in the order of decreasing effectiveness: Mg2+, Zn2+, Ca2+, Co2+, Mn2+. No activity is detectable without a divalent cation	725308	
2.7.7.23	Co2+	a cobalt ion substitutes for Mg2+A in the crystal structure	740866	
2.7.7.23	Co2+	absolute requirement for a divalent cation. The order of effectiveness of metal ions on the activity of the enzyme is Co2+, Mn2+, Mg2+ and Zn2+	748158	
2.7.7.23	Co2+	binds to enzyme	643075	
2.7.7.23	Co2+	can partially replace Mg2+	643057, 643059, 643061, 643067