The growth hormone-releasing factor (GHRF) is released by the hypothalamus and acts on the adenohypophyse to stimulate the secretion of growth hormone.Rat: H-His-Ala-Asp-Ala-Ile-Phe-Thr-Ser-Ser-Tyr-Arg-Arg-Ile-Leu-Gly-Gln-Leu-Tyr-Ala-Arg-Lys-Leu-Leu-His-Glu-Ile-Met-Asn-Arg-Gln-Gln-Gly-Glu-Arg-Asn-Gln-Glu-Gln-Arg-Ser-Arg-Phe-Asn-OH or H-HADAIFTSSYRRILGQLYARKLLHEIMNRQQGERNQEQRSRFN-OH