to assay the promoter activity , the 1.3-kilobase genomic fragment containing the 5'-flanking region , first exon , and a part of first intron at positions -1222 to +44 was fused upstream to the chloramphenicol acetyltransferase gene , then transfected into hepg2 and t98g cells .
C0015295
exon
C0007634
cells