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A nonapeptide hormone of the neurohypophysis of subvertebrates, with activities similar to that of vasopressin and oxytocin; chemically identical with human vasopressin except for an isoleucyl residue at position 3; thus [3-isoleucine]vasopressin or [Ile3]vasopressin.
[vaso, pressin + oxytocin]
the normal antidiuretic hormone in birds. One of the hormones released by the avian posterior pituitary gland. Called also arginine vasotocin, AVT. Is also active in stimulating uterine contraction.