We have previously described a mutant B lymphoblastoid cell line , Clone-13 , that expresses HLA-DQ in the absence of HLA -DR and -DP .
we have previously described a mutant b lymphoblastoid cell line , clone-13 , that expresses hla-dq in the absence of hla -dr and -dp .
O O O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line I-cell_line O O B-protein_molecule O O O O O O O O O