targeted mutation 1, Christophe Benoist and Diane Mathis AB0 MGI:1927483 Class II<0> A<b>beta<-> H2-Ab1tm1Doi Null/knockout MHC-II-k.o. Abeta- H2-Ab1<tm1Dim> II<0> http://identifiers.org/mgd/MGI:1927483 H2-Ab1<tm1Doi> MHC class II- A beta<0> MHCII<->