3.5.1.13 Ca2+ activates at 1 mM 718672 3.5.1.13 KI activates 208989 3.5.1.13 Mg2+ activates 1.1fold at 1 mM 718672 3.5.1.13 Mg2+ activates 1.3fold at 1 mM 718672 3.5.1.13 Mn2+ activates 1.1fold at 1 mM 718672 3.5.1.13 Mn2+ activates 1.3fold at 1 mM 718672 3.5.1.13 additional information no requirement for metal ions 733190 3.5.1.13 NaI activates 208989