title: Structure activity studies on somatostatin.
abstract: Seven synthetic analogues of somatostatin helped clarify structural requirements for suppression of growth hormone secretion in rats. Size of the ring is not critical; deletions of serine-13, lysine-4 or asparagine-5 result in peptides which retain an appreciable fraction of the activity. The analogue des-Ala1, Gly2, Asn5-somatostatin lowers plasma growth hormone and insulin levels without affecting plasma glucagon levels significantly.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005934:Glucagon / Q000097:blood; D013006:Growth Hormone / Q000097:blood; D007328:Insulin / Q000097:blood; D008722:Methods; D051381:Rats; D013004:Somatostatin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D007328:Insulin; D013004:Somatostatin; D013006:Growth Hormone; D005934:Glucagon