tokens: Expression of human MHC HLA-DRA class II gene can be up-regulated in B cells by Ig cross-linking as well as by phorbol esters such as 12-O-tetradecanoyl phorbol 13-acetate ( TPA ) .
folded_tokens: expression of human mhc hla-dra class ii gene can be up-regulated in b cells by ig cross-linking as well as by phorbol esters such as 12-o-tetradecanoyl phorbol 13-acetate ( tpa ) .
labels: O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-cell_type I-cell_type O O O O O O O B-other_organic_compound I-other_organic_compound O O B-other_organic_compound I-other_organic_compound I-other_organic_compound O B-other_organic_compound O O