3.1.1.32 Ba2+ divalent cation required 94311 3.1.1.32 Ca2+ 10 mM, 10% activation 133898 3.1.1.32 Ca2+ 111.5% relative activity at 5 mM Ca2+ 692119 3.1.1.32 Ca2+ activates at 10 mM 729743 3.1.1.32 Ca2+ dependent on 681568 3.1.1.32 Ca2+ divalent cation required, Ca2+ being most effective, maximal activity at 10 mM 94311 3.1.1.32 Ca2+ independent of Ca2+ at pHs below 7.4, striking pH dependence at alkaline pH 94340 3.1.1.32 Ca2+ no requirement 94332, 94341 3.1.1.32 Ca2+ required 729305, 94324 3.1.1.32 Ca2+ required for actiivty, one Ca2+ per monomer bound at the dimer interface 650360