{"symbol":"CYB5A","synonyms":["METAG","MCB5","CYB5"],"name":"cytochrome b5 type A (microsomal)","description":"The protein encoded by this gene is a membrane-bound cytochrome that reduces ferric hemoglobin (methemoglobin) to ferrous hemoglobin, which is required for stearyl-CoA-desaturase activity. Defects in this gene are a cause of type IV hereditary methemoglobinemia. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2010]","ncbiEntrezGeneId":1528,"ncbiEntrezGeneUrl":"http://www.ncbi.nlm.nih.gov/gene/1528","proteins":[{"symbol":"CYB5_HUMAN","href":"/api/1.0/protein/CYB5_HUMAN"}],"hgncRootFamilies":[]}