Abstract
A protein that binds specifically to the nucleotide sequence ACCACAACA located at residues −247 to −255 upstream of the +1 site of the arylphorin gene of Sarcophaga peregrina was purified to homogeneity from fat body nuclei of third instar larvae. This DNA-binding protein consisted of two subunits with molecular masses of 40 kDa and 42 kDa, respectively. Accurate transcription initiation of a truncated arylphorin gene in a nuclear extract of NIH-Sape-4 cells, an embryonic cell line of Sarcophaga, was significantly enhanced in the presence of the purified DNA-binding protein.
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