Mfn1 genetic mapping 6330416C07Rik HR2 mitofusin 1 Gene 2310002F04Rik http://identifiers.org/mgd/MGI:1914664 protein coding gene HR2|6330416C07Rik|D3Ertd265e|2310002F04Rik + D3Ertd265e MGI:1914664 O