norepinephrine n-methyltransferase ( nmt ; the epinephrine-forming enzyme ) from pigeon brain had km values for s-adenosyl-l-methionine and l-norepinephrine of 24 +/- 1 and 101 +/- 4 micrometer , respectively .
C0014563
epinephrine
C0028351
l-norepinephrine