The GATA-1 and Sp1 binding sites in this promoter lacking a TATA sequence were necessary for a high level of transcription activation .
the gata-1 and sp1 binding sites in this promoter lacking a tata sequence were necessary for a high level of transcription activation .
O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-other_name I-other_name O