Immunocytochemical evidence for the association of neurophysin-I with vasopressin and neurophysin-II with oxytocin in the pig hypothalamus.

Antisera raised against oxytocin, [8-arginine]-vasopressin, porcine neurophysin-I and porcine neurophysin-II were used to localize the neurohypophysial hormones and neurophysins in the paraventricular nucleus (PVN) of the pig using immunoenzyme cytochemical techniques. In sagittal section, the dorsolateral part of the PVN appeared as a densely populated group of cells which stained heavily for neurophysin-I and vasopressin with only a few neurons staining for neurophysin-II and oxytocin.