CD4∶CD8 T cell ratio and extracellular MHC class I and II expression in spleens of congenic and recombinant strains.

aRT1 haplotype designations are based on genotyping data (see Methods);bStrains were compared in separate experiments to DA littermate controls. The mean fluorescent intensity was then normalized to the expression of DA, which was given an arbitrary value of 100.cMHC-I (class Ia and Ib; OX18) extracellular expression on WBCs.dMHC class II expression on B cells. Significant differences compared to DA:eP;fP;gP.WT, wildtype; PS, parental strain; RCS, recombinant congenic strain. Shown are mean values ±SD.