“Treatment … apigenin also significantly inhibited the [Ca(2+)](i) response induced by 50 mM KCl solution, decreased … [Ca(2+)](i) responses induced by the metabotropic glutamate receptor agonist, (S)-3,5-dihydroxyphenylglycine ( DHPG , 100 microM, 90 s), and inhibited the caffeine (… mM, 2 min)-induced [Ca(2+)](i) responses.”