The pCMV-GLuc 2 Control Plasmid is a mammalian expression vector that encodes the secreted luciferase from the copepod Gaussia princeps as a reporter, under the control of the constitutive CMV (cytomegalovirus) promoter. Gaussia luciferase (GLuc) is a 19 kDa protein encoded by a “humanized” sequence, and it contains a native signal peptide at the N-terminus that allows it to be secreted from mammalian cells into the cell culture medium (1,2). A neomycin resistance gene under the control of an SV40 promoter allows selection for stable integration of the plasmid into the mammalian cell genome using G418.