2.5.1.97 Ca2+ pseudaminic acid synthase requires the presence of a divalent metal ion for catalysis. Addition of 10 mM Mg2+ results in 30% of the activity obtained with 10 mM Co2+ 715481 2.5.1.97 Co2+ pseudaminic acid synthase requires the presence of a divalent metal ion for catalysis. The highest values are observed in the presence of Mn2+ and Co2+ (10 mM) 715481 2.5.1.97 Mg2+ pseudaminic acid synthase requires the presence of a divalent metal ion for catalysis. Addition of 10 mM Mg2+ results in 48% of the activity obtained with 10 mM Co2+ 715481 2.5.1.97 Mn2+ pseudaminic acid synthase requires the presence of a divalent metal ion for catalysis. The highest values are observed in the presence of Mn2+ and Co2+ (10 mM) 715481 2.5.1.97 Ni2+ pseudaminic acid synthase requires the presence of a divalent metal ion for catalysis. Addition of 10 mM Mg2+ results in 26% of the activity obtained with 10 mM Co2+ 715481