PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24019880-1 2013 The mitochondrial enzyme 25-hydroxyvitamin D 1alpha-hydroxylase, which is encoded by the CYP27B1 gene, converts 25OHD to the biological active form of vitamin D, 1,25-dihydroxyvitamin D (1,25(OH)2D). Vitamin D 35-44 cytochrome P450, family 27, subfamily b, polypeptide 1 Mus musculus 89-96