a method has been devised for collecting hypophysial portal blood from the anaesthetised guinea pig in order to measure the release in vivo of the neurohypophysial peptides , oxytocin ( ot ) , vasopressin ( avp ) , neurophysin ( np ) , and the glycopeptide ( gp ) found at the carboxyl terminus of the avp precursor .
C0032017
neurohypophysial peptides
C0030095
oxytocin