PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12084061-5 2002 These findings suggest that the difference in adduct agonist activity reflects the differences in the positive charge and carbon chain length of the polyamine covalently linked with the VIP Gln16 residue. Polyamines 149-158 vasoactive intestinal polypeptide Mus musculus 186-189