Fig. 1.

Enteric nerve varicosities in wild-type (WT) and dilute, brown, non-agouti (DBA) mice. Top: light microscopic appearance of the varicosities. Individual varicosities appear rounded in shape. Some plated varicosities form clusters and appear clumped. Varicosities from WT and DBA mice appear similar. Middle: PGP 9.5 staining neural structures. Bottom: colocalization. Brightness enhancement was applied to whole fields to better visualize fluorescent signals on a transmitted light background. No changes were made to darkness levels, and no nonlinear adjustments were made. Scale bars = 3 μm.