text: VMATs are found in a variety of cell types throughout the body, however, VMAT1 is found exclusively in neuroendocrine cells, in contrast to VMAT2, which is also found in the PNS and CNS.  Specifically, VMAT1 is found in chromaffin cells, enterochromaffin cells, and small intensely fluorescent cells (SIFs).   Chromaffin cells are responsible for releasing the catecholamines (norepinephrine and epinephrine) into systemic circulation.  Enterochromaffin cells are responsible for storing serotonin in the gastrointestinal tract.  SIFs are interneurons associated with the sympathetic nervous system which are managed by dopamine.