Fig. 2. Schematic representation of reporter vectors containing the 5′-flanking region of the COX-2 gene promoter with mutations. The luciferase reporter vector driven by the COX-2 promoter region (− 327/+ 59) mutated at the NF-κB, NF-IL6 or CRE site. The mutated sequences are listed as below: NF-κB site (−233/−214): be changed from GGGACTACCC to cacACTACCC; NF-IL6 site (−132/−124): be changed from TTACGCAAT to TTggtaccT; CRE site (−59/−53): be changed from TTCGTCA to TTgagCt.