PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 5441240-5 1970 Some ions, formed by cleavage between C-3 and C-4 in the long-chain base, indicate the phytosphingosine nature of the ceramide. phytosphingosine 87-103 complement C4A (Rodgers blood group) Homo sapiens 46-49