MGI:4451714 Negr1<tm1a(KOMP)Wtsi> Null/knockout|Reporter|Conditional ready EPD0499_1_H04 EPD0499_1_D04 KOMP-CSD-Project EPD0655_4_A08 http://identifiers.org/mgd/MGI:4451714 targeted mutation 1a, Wellcome Trust Sanger Institute