Specific neurons in chick central nervous system stain with an antibody against chick intestinal vitamin D-dependent calcium-binding protein.

A specific antiserum against intestinal vitamin D-dependent calcium-binding protein (CaBP) was used for a systematic immunohistochemical evaluation of immunoreactive sites in the central nervous system of chick. CaBP was observed in the perikarya, dendrites and axons of a specific population of neurons. It is concluded that CaBP represents a marker for selected neurons in the central nervous system of chick.