the procedure involves collagenase digestion of bovine adrenomedullary tissue , isolation of cells through gentle filtration , separation of chromaffin from nonchromaffin cells on discontinuous gradients of the radiopaque contrast renografin , and separation of adrenaline-enriched from noradrenaline-enriched fractions after centrifugation on self-generated percoll gradients .
C0014563
adrenaline
C0028351
noradrenaline