Figure 1.

M1.DR1 is constitutively negative for expression of Ii and HLA-DM. Whole cell lysates were transferred onto nitrocellulose and probed with mAb VICY1 (A) or mAb 5C1 (B); antibody binding was detected with the ECL system (Amersham International). For B, cells were grown in the absence or presence of rIFNγ as indicated. DMA, HLA-DMα chain.