The two tiny ring X chromosomes studied with an antibody specific for the acetylated isoforms of histone H4 marking transcribed chromatin domains were labeled at a level consistent with their being active .
the two tiny ring x chromosomes studied with an antibody specific for the acetylated isoforms of histone h4 marking transcribed chromatin domains were labeled at a level consistent with their being active .
O O O O B-DNA_molecule I-DNA_molecule O O O B-protein_family_or_group O O O O O O B-protein_molecule I-protein_molecule O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O