tokens: Electrophoretic mobility shift assays revealed that Sp1 binds to two different regions in the proximal promoter , a typical Sp1 site located at ( -38 ; -33 ) and a G / C rich region between ( -67 ; -62 ) .
folded_tokens: electrophoretic mobility shift assay reveal that sp1 bind to two different region in the proximal promoter , a typical sp1 site located at ( -38 ; -33 ) and a g / c rich region between ( -67 ; -62 ) .