. . . "According to the present invention a Y2 receptor-binding peptide includes the free bases, acid addition salts or metal salts, such as potassium or sodium salts or the peptides Y2 receptor-binding peptides that have been modified by such processes as amidation, glycosylation, acylation, sulfation, phosphorylation, acetylation and cyclization, (U.S. Pat. No. 6,093,692; and U.S. Pat. No. 6,225,445 an" . .