PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10959000-6 2000 We conclude that the biologic activity of alpha-MSH, as observed through the levels of cAMP, declines when the length of its polypeptide chain is shortened, and that the presence of glutamic acid in the molecule, as well as the core sequence, are of importance for fragments" activity. Glutamic Acid 182-195 proopiomelanocortin Homo sapiens 42-51