Tg(SMN2*delta7)4299Ahmb SMNdelta7|Tg(SMN1*delta7)4299Ahmb MGI:3056917 http://identifiers.org/mgd/MGI:3056917 Transgene SMNdelta7 transgene O Tg(SMN1*delta7)4299Ahmb transgene insertion 4299, Arthur H M Burghes