PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10336378-8 1999 The structural implication is that, in 2-chloro-CCM conversion by CMCIase, the lactone ring of 5-chloromuconolactone rotates before dehalogenation to bring the acidic C4 proton next to K169. Lactones 79-86 complement C4A (Rodgers blood group) Homo sapiens 160-169 1931973-3 1991 The absolute configuration at C-4 was determined to be S by locating the 13C label in the lactone ring of the trans isomeric lactone and in the hydroxymethyl group of the cis isomer following HPLC separation of both isomers and analysis by GC/MS/MS techniques. Lactones 90-97 complement C4A (Rodgers blood group) Homo sapiens 30-33 1931973-3 1991 The absolute configuration at C-4 was determined to be S by locating the 13C label in the lactone ring of the trans isomeric lactone and in the hydroxymethyl group of the cis isomer following HPLC separation of both isomers and analysis by GC/MS/MS techniques. Lactones 125-132 complement C4A (Rodgers blood group) Homo sapiens 30-33