VP-positive cells in the SCN of CBA/J and CBA/N mice. A. Coronal SCN sections stained with an antibody against VP show that in both CBA/J and CBA/N mice, VP-positive cell bodies are found primarily in the dorsal shell. B. Magnified area indicating the ability to count cell bodies stained for VP. Scale bar = 20 μm. C. The average number of detectable VP-positive cells per SCN is greater in CBA/J mice compared to CBA/N. Scale bar = 100 μm. * = p = 0.01, t10 = 3.15.