Transgene Tg(IGHyH1)2BJkbv http://identifiers.org/mgd/MGI:3802670 transgene transgene insertion 2B, Aya Jakobovits HuAb-mu Tg(IGH@yH1)2BJkbv MGI:3802670 O HuAb-mu|yH1|Tg(IGHyH1)2BJkbv yH1