The pGL4.37[luc2P/ARE/Hygro] Vector(a–e) contains four copies of an antioxidant response element (ARE) that drives transcription of the luciferase reporter gene luc2P (Photinus pyralis). luc2P is a synthetically derived luciferase sequence with humanized codon optimization that is designed for high expression and reduced anomalous transcription. Theluc2P gene contains hPEST, a protein destabilization sequence, which allows luc2P protein levels to respond more quickly than those of luc2 to induction of transcription. The vector backbone contains an ampicillin resistance gene to allow selection in E. coli and a gene for hygromycin resistance to allow selection of stably transfected mammalian cell lines.