the distribution of silver grains following [ 3h ] 5-htp uptake was found to be uniform over each of the two main cell populations , adrenaline-storing ( a ) cells and noradrenaline-storing ( na ) cells in the adrenal medulla , but a cells were twice as active as na cells in incorporating the isotope , a situation very similar to that found after [ 3h ] dopa uptake .
C0014563
adrenaline
C0028351
noradrenaline