In several cases , the peptide epitope and HLA-restricting determinant recognized by these CTLs has been defined , one unusual feature being the number of responses restricted through HLA-C alleles .
in several cases , the peptide epitope and hla-restricting determinant recognized by these ctls has been defined , one unusual feature being the number of responses restricted through hla-c alleles .
O O O O O B-peptide I-peptide O O O O O O B-cell_type O O O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O