The pGL4 Luciferase Reporter Vectors are the next generation of reporter gene vectors optimized for expression in mammalian cells. Numerous configurations of pGL4 Vectors are available, including those with the syntheticluc2(Photinus pyralis) andhRluc(Renilla reniformis) genes, which have been codon optimized for more efficient expression in mammalian cells. Furthermore, both the reporter genes and the vector backbone, including the bla (β-lactamase or Ampr) gene, have been engineered to reduce the number of consensus transcription factor binding sites, reducing background and the risk of anomalous transcription.