2.5.1.63 K+ in the coupled assay with SAM synthase and fluorinase 658449 2.5.1.63 Mg2+ 1 mM, 9.5% stimulation 760084 2.5.1.63 Mg2+ in the coupled assay with SAM synthase and fluorinase 658449 2.5.1.63 Mg2+ slightly activating 738197 2.5.1.63 Mn2+ slightly activating 738197 2.5.1.63 additional information Mg2+ at 1 mM does not affect enzyme activity 637250