The cross-reaction patterns of the MRC OX-3, OX-6, and OX-17 monoclonal antibodies on rat inbred and congenic strains.

: MRC OX-3, MRC OX-6, and MRC OX-17 antibodies directed against rat MHC class II antigens were tested on a panel of rat inbred and congenic strains with different haplotypes using indirect immunoperoxidase and immunofluorescence techniques. In accordance with reports of others the MRC OX-17 was found to define RT1 class II monomorphic and the MRC OX-3 polymorphic determinants. MRC OX-6, giving no reaction with RT1d and RT1dv1 haplotypes, was shown to be directed against a rat MHC class II polymorphic determinant.