Fig. 5.
Mutation analysis of EpRE in rat GP5. (A) Nucleotide sequence of oligonucleotides used to examine EpRE activity; mutated nucleotides are underlined. (B) Mutation in GP5 EpRE core sequence abrogated its HNE responsiveness. L2 cells were transfected with luciferase reporters generated by cloning oligonucleotides containing wild-type and mutated EpREs into pGL-3 promoter luciferase vector. (C) Mutation assay at whole gene level. Site-directed mutagenesis was performed with GP5 (−645/+18)-Luc as the template, and constructs were transient-transfected into L2 cells. n = 3, *p < 0.01 compared with vehicle control, #p < 0.01 compared with vehicle vector.