in normal adrenal medullae the tissue content of tyrosine hydroxylase activity correlated inversely with the tissue contents of epinephrine ( r equals -0.78 , p less than 0.001 ) , norepinephrine ( r equals -0.78 , p less than 0.001 ) and total catecholamines ( r equals -0.87 , p less than 0.001 ) , respectively but no significant relation was found between both parameters in pheochromocytomas .
C0014563
epinephrine
C0028351
norepinephrine