The pGL4.13[luc2/SV40] Vector(a–e)encodes the luciferase reporter gene luc2 (Photinus pyralis) and is designed for high expression and reduced anomalous transcription. The pGL4 Vectors are engineered with fewer consensus regulatory sequences and a synthetic gene, which has been codon optimized for mammalian expression. The pGL4.13[luc2/ SV40] Vector contains the luc2 reporter gene and the SV40 early enhancer/promoter for use as an expression control or a co-reporter vector.