in many cases distributions overlap ( for example , dopamine and somatostatin , dopamine and neurotensin , neuropeptide y and somatostatin ) and alpha-msh and beta-endorphin seem to have identical distributions but there are also distinctive neuronal populations containing only one of the described transmitters or neuropeptides ( neuropeptide y and alpha-msh ) .
C0027895
neuropeptides
C0027893
neuropeptide y