analysis of the expression of hla-dr antigens on the surface of undifferentiated and mature cells with two monoclonal antibodies directed against hla-dr monomorphic determinants , indicated that 1 ) upon differentiation induced with ra , dmso , and tpa the cells never acquired surface dr antigens , and 2 ) normal peripheral blood granulocytes lacked these antigens .
C0007634
cells
C0007589
differentiation