the calcitonin gene related peptide ( cgrp ) gene is a complex transcription unit that is expressed in a highly restricted pattern in both the nervous system , particularly in sensory ganglia and brainstem , and in the thyroid c cells of the endocrine system , with tissue-specific alternative rna processing events generating transcripts encoding either the hormone , calcitonin , or the neuropeptide , cgrp .
C0027895
neuropeptide
C0006669
cgrp