MHC class II density on the APC was modified using DQ2 homo -and hetero zygous B-LCLs as APCs , however this variation of MHC concentration had no effect on T cell proliferation .
mhc class ii density on the apc was modified using dq2 homo -and hetero zygous b-lcls as apcs , however this variation of mhc concentration had no effect on t cell proliferation .
B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-cell_type O O O O O O O O O O B-cell_type O O O O O O O O O O O B-cell_type I-cell_type O O