activity of serotonin n-acetyltransferase ( ec 2.3.1.5 ) in rat pineal organ is rapidly and markedly elevated in vivo after administration of beta- ( 3,4-dihydroxyphenyl ) -l-alanine ( l-dopa ) , norepinephrine , epinephrine , isoproterenol , monoamine oxidase inhibitors , or theophylline .
C0028351
norepinephrine
C0014563
epinephrine