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Nerve fibers and microvessels in the mucosa are shown in vertical sections of the mouse proximal colon. The vessels were painted by WGA perfusion (cyan) and PGP9.5, TH, CGRP, and VIP-ir nerve fibers were immunostained (red). More CGRP and VIP-ir than TH-ir nerve fibers are projected to the top of the mucosa (arrows). TH-ir terminals rarely reached the capillary rings at the mucosa top (arrows in the 2nd row). Yellow arrows in the top row indicate an arteriole in the lamina propria.
