It has long been a puzzle that MHC class II molecules are expressed in human T cells after activation but not in mouse T cells ; this expression is believed to play a role in the cell mediated immune response .
it has long been a puzzle that mhc class ii molecules are expressed in human t cells after activation but not in mouse t cells ; this expression is believed to play a role in the cell mediated immune response .
O O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-cell_type I-cell_type I-cell_type O O O O O B-cell_type I-cell_type I-cell_type O O O O O O O O O O O B-other_name I-other_name I-other_name I-other_name O