tokens: We have shown previously that amplified expression of the B2 subunit of the V-ATPase occurs solely by increased transcription , and that the 5'-untranslated region of the B2 gene , containing multiple consensus binding sites for the transcription factors AP-2 and Sp1 , is required for this expression .
folded_tokens: we have shown previously that amplified expression of the b2 subunit of the v-atpase occurs solely by increased transcription , and that the 5'-untranslated region of the b2 gene , containing multiple consensus binding sites for the transcription factors ap-2 and sp1 , is required for this expression .
labels: O O O O O O O O O B-protein_subunit I-protein_subunit O O B-protein_molecule O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_family_or_group I-protein_family_or_group B-protein_molecule O B-protein_molecule O O O O O O O