PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23051753-6 2012 The structure of MR1 in complex with 6-formyl pterin, a folic acid (vitamin B9) metabolite, shows the pterin ring sequestered within MR1. Pterins 46-52 major histocompatibility complex, class I-related Homo sapiens 17-20 23051753-6 2012 The structure of MR1 in complex with 6-formyl pterin, a folic acid (vitamin B9) metabolite, shows the pterin ring sequestered within MR1. Pterins 46-52 major histocompatibility complex, class I-related Homo sapiens 133-136