MGI:5319843 EPD0283_5_C09 EPD0283_5_B10 targeted mutation 1a, Wellcome Trust Sanger Institute http://identifiers.org/mgd/MGI:5319843 EPD0283_5_E12 Spo11<tm1a(KOMP)Wtsi> KOMP-CSD-Project EPD0283_5_G10