How does a candidate peptide become a hormone?
D055598:Chemical Phenomena; D002621:Chemistry; D002766:Cholecystokinin / Q000032:analysis; D005749:Gastric Inhibitory Polypeptide / Q000032:analysis; D005768:Gastrointestinal Hormones / Q000502:physiology*; D006801:Humans; D010455:Peptides / Q000502:physiology*; D011863:Radioimmunoassay
D005768:Gastrointestinal Hormones; D010455:Peptides; D005749:Gastric Inhibitory Polypeptide; D002766:Cholecystokinin