FCGR2B and nephritis: Despite examining 2 unique spontaneous nephritis models with variable levels of histologic disease (Supplemental Figure 4 and Supplemental Table 2), the composition of the T cell clusters of KITs was quite similar (Supplemental Figure 5 and Supplemental Figure 6, A and B), When evaluating clusters by model, only the IFNhi cluster was differentially represented, being increased among the FcγR2B–/–.