One base pair change abolishes the T cell-restricted activity of a kB-like proto-enhancer element from the interleukin 2 promoter .
one base pair change abolishes the t cell-restricted activity of a kb-like proto-enhancer element from the interleukin 2 promoter .
O O O O O O B-other_name I-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O