PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21880102-8 2011 Deuterium was completely exchanged with hydrogen at the substituted carbon atom (C-2) of the succinate adducts of n-alkanes, whereas it is retained in toluene-derived benzylsuccinate, regardless of the type of enzyme catalysing the fumarate addition reaction. n-alkanes 114-123 complement C2 Homo sapiens 81-84