targeted mutation 1a, Wellcome Trust Sanger Institute EPD0757_2_B03 EPD0757_2_G02 EPD0757_2_F02 EPD0757_2_C04 http://identifiers.org/mgd/MGI:4944401 EPD0757_2_G01 EPD0757_2_B04 KOMP-CSD-Project MGI:4944401 Jrk<tm1a(KOMP)Wtsi>