when the parakeets were injected with 3h-5-htp alone or pretreated with drugs interfering with monoamine metabolism ( e.g . r04-4602 , nialamide ) prior to injection of the label , the srp cells always exhibited specific radioautographic reactions , in the regions of the dense secretory granules of the cell body and asynaptic pedicles .
C1327616
srp cells
C0007634
cell