PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18779575-4 2008 Defects in MMACHC represent the most common cause of inborn errors of B(12) metabolism, and our results explain the observation that fibroblasts from these patients are poorly responsive to vitamin B(12) but show some metabolic correction with aquocobalamin, a cofactor form lacking the cyanide ligand, which is mirrored by patients showing poorer clinical responsiveness to cyano- versus aquocobalamin. aquacobalamin 244-257 metabolism of cobalamin associated C Homo sapiens 11-17