6.5.1.3 Mg2+ magnesium ion interacts with the beta and gamma-phosphate groups and is almost perfectly octahedrally coordinated by six phosphate and water oxygen atoms 662636 6.5.1.3 Mg2+ Mg2+ or Mn2+ required 662241 6.5.1.3 Mn2+ Mg2+ or Mn2+ required 662241 6.5.1.3 additional information no detectable activity with Ca2+, Sr2+, Ba2+, Zn2+, Co2+, Cd2+, Pb2+, Co(NH3)6 3+, or spermine 650172 6.5.1.3 Mg2+ nucleotidyl transfer Mg2+ dependent 652246 6.5.1.3 Mn2+ only marginal activity 650172 6.5.1.3 Mn2+ optimum activity at 1 mM 653392 6.5.1.3 Mg2+ optimum activity at 5 mM 653392 6.5.1.3 Mg2+ required 1910, 1983, 1995 6.5.1.3 Mg2+ requires metal ions for structure and catalysis 650172