3.2.2.6 Ag+ 50% inhibition of NADase and 300% activation of adenosine diphosphate cyclase 326409 3.2.2.6 Ag+ at 2 mM 50% inhibition of NADase activity and 300% activation of ADPR activity 326409 3.2.2.6 Cu2+ stimulation of cADPR activity 326409 3.2.2.6 additional information no effects by K+, Cd2+, Fe2+, Fe3+, and Mn2+ 326409