we previously defined two distinct cell-specific dna elements controlling the transient expression of the transthyretin gene in hep g2 ( human hepatoma ) cells : a proximal promoter region ( -202 base pairs [ bp ] to the cap site ) , and a far-upstream cell-specific enhancer located between 1.6 and 2.15 kilobases ( kb ) 5 ' of the cap site ( r .
C1519818
upstream
C0007634
cell