Another LTR size variation was observed in four patients in a region just upstream of the NF-kappa B enhancer .
another ltr size variation was observed in four patients in a region just upstream of the nf-kappa b enhancer .
O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-multi_cell O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O