substance P (SP) and neuropeptide Y (NPY) was compared to the general neurochemical
markers for nerves and neuroendocrine cells protein gene product 9.5 (PGP 9.5) and
neurone-specific enolase (NSE), by use of the avidin-biotin peroxidase complex method in
developing dental structures in rats aged 13 to 27 days. A substantially greater part of the
nerve fibres was immunoreactive to CGRP and SP than to NPY. In the bell stage, nerve …