It was possible that one of the clone 13 CIITA alleles bore a mutation that allowed HLA-DQ , but not HLA -DR or -DP transcription .
it was possible that one of the clone 13 ciita alleles bore a mutation that allowed hla-dq , but not hla -dr or -dp transcription .
O O O O O O O B-cell_line I-cell_line B-protein_molecule O O O O O O B-DNA_domain_or_region O O O O O O O O O