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- _5 value "CYP7-directed gene transcription in HepG2 cells transfected with a 5'-CYP7 promoter-chloramphenicol acetyl-transferase reporter was activated up to 12-fold upon cotransfection of a DBP expression vector, whereas an HNF-1 alpha expression vector did not stimulate CYP7 gene activity. 5'-Deletion analyses and site-specific mutagenesis revealed that this stimulating effect of DBP can in part be ascribed to its functional interaction with DBP binding sites B (nts -115/-125), C (nts -172/-195), and D (nts -214/-230). C/EBP beta (LAP), another liver-enriched basic-leucine zipper transcription factor, bound to these same sites but effected a more modest increase in CYP7-directed gene transcription (up to 3-4-fold) when expressed in HepG2 cells. " provenance.
- _5 wasQuotedFrom 8182075 provenance.