Hel-Ig MD4 MGI:3053738 Ig-transgenic Transgene MD4 Ig|HELmuMT|MD4-RAG|MD4 Ig BCR Tg|MD4 HEL Ig|Hel-Ig|Ig<HEL>|MD4|Ig-transgenic|MD-3 Ig<HEL> HELmuMT MD4 Ig MD4-RAG transgene transgene insertion 4, Christopher C Goodnow Tg(IghelMD4)4Ccg syntenic MD4 HEL Ig MD4 Ig BCR Tg MD-3 O http://identifiers.org/mgd/MGI:3053738