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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A bi-functional reporter plasmid for the simultaneous transient expression assay of two herpes simplex virus promoters.

We have constructed a transient expression vector (pCAL) containing two reporter genes, chloramphenicol acetyltransferase (CAT) and beta-galactosidase (beta-gal) for use in studying herpes simplex virus type 1 (HSV-1) promoter activity in mammalian cells. The construct was designed to be useful in analyzing the simultaneous expression from two different promoters. To test the utility of the vector, we used three HSV-1 promoters that had been characterized previously by workers in this laboratory. Two are early (beta) promoters, for alkaline exonuclease and deoxyuridine triphosphate nucleotidohydrolase; the third promoter controls the major capsid protein transcript and is late (beta gamma). The two different kinetic classes of promoters were ligated in a divergent orientation into pCAL and transfected into rabbit skin fibroblast. Transfected cells were then superinfected with low multiplicities of HSV-1; 18 hr later, we observed the simultaneous expression of both marker genes under control of the respective promoters. The usefulness of such a transient expression reporter vector is discussed.[1]


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