Ren1c MGI:97898 Ren1d Gene renin 1 structural Rnr Ren Ren1 Ren-1 http://identifiers.org/mgd/MGI:97898 + Rn-1 O protein coding gene Ren-A|Ren1c|Ren-1|Rn-1|Rnr|Ren|Ren1d genetic mapping Ren-A