PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 29150896-4 2018 The stereospecific effect in CID of the trans-cO residue is explained by syn-facially directed proton transfer from the 4-ammonium group at cO to the C-terminal amide followed by neighboring group participation in the cleavage of the CO-NH bond, analogous to the aspartic acid and ornithine effects. Ornithine 281-290 synemin Homo sapiens 73-76