3.1.4.54 Ba2+ 10 mM, stimulates 710098 3.1.4.54 Ba2+ stimulated up to 30fold by millimolar order of Ca2+. This effect is fully substituted by other divalent cations such as Co2+, Mg2+, Mn2+, Ba2+, Sr2+ and Ni2+ 666213 3.1.4.54 Ba2+ stimulates 680640 3.1.4.54 Ca2+ activation is observed only in the enzyme preparations after solubilization, EC50: 3 mM. Synergistic activation of the enzyme by spermine and CaCl2 or by spermine and Triton X-100 is not observed 708109 3.1.4.54 Ca2+ in the presence of 100 mM phospholipid (phosphatidylethanolamine, phosphatidylcholine, or phosphatidylserine), Ca2+ dose-dependently activates NAPE-PLD in varied degrees. Ca2+ at 10 mM stimulates the activity 2.1 fold in the presence of phosphatidylethanolamine. In the presence of phosphatidylcholine or phosphatidylserine, the stimulatory effects of 10 mM Ca2+ (5.2 and 10 fold, respectively) are similar to the effect by 10 mM Ca2+ in the absence of phospholipids (7fold) 710098 3.1.4.54 Ca2+ required 710115 3.1.4.54 Ca2+ stimulated up to 30fold by millimolar order of Ca2+. This effect is fully substituted by other divalent cations such as Co2+, Mg2+, Mn2+, Ba2+, Sr2+ and Ni2+ 666213 3.1.4.54 Ca2+ stimulates at millimolar concentrations, EC50: 1.4 mM 680640 3.1.4.54 Co2+ 10 mM, stimulates 710098 3.1.4.54 Co2+ stimulated up to 30fold by millimolar order of Ca2+. This effect is fully substituted by other divalent cations such as Co2+, Mg2+, Mn2+, Ba2+, Sr2+ and Ni2+ 666213