in the nerve fibers associated with the epithelium and in nerve cell bodies in local ganglia of the tracheal wall , galanin was found to coexist with several other neuropeptides ( neuropeptide y , vasoactive intestinal peptide and substance p ) suggesting co-expression of multiple neuropeptide genes in the same population of neurons .
C0027895
neuropeptides
C0027893
neuropeptide y