tokens: We previously delineated a region in the fatty-acid synthase promoter , which was responsible for obesity related overexpression of the fatty-acid synthase ( FAS ) gene , by negatively regulating the activity of the downstream promoter in lean but not obese rat fat cells .
folded_tokens: we previously delineate a region in the fatty-acid synthase promoter , which be responsible for obesity related overexpression of the fatty-acid synthase ( fa ) gene , by negatively regulate the activity of the downstream promoter in lean but not obese rat fat cell .