Figure 2.

Differential MHC class II expression on BMDMs but not on B cells. The anti-MHC class II ABC of fresh splenic B cells, splenic B cells that had been LPS-activated for 2 days, fresh splenic macrophages, and 7-day-old BMDMs grown on plastic dishes was analyzed. The ABC was then used to calculate the number of surface-bound anti-MHC class II antibodies. For each of the experimental groups, spleen cells and bone marrow cells from three to five mice were pooled. The symbols representing the different haplotypes are given.