tokens: Some artificial promoter constructs containing multiple Sp1 sites were highly responsive to ethanol , but others were not , suggesting that the organization of the proximal promoter region was an additional factor that affected the ethanol response .
folded_tokens: some artificial promoter construct contain multiple sp1 site be highly responsive to ethanol , but other be not , suggest that the organization of the proximal promoter region be a additional factor that affect the ethanol response .