The Protein Expression Center was established to provide researchers with large amounts of proteins of interest to their work. It is equipped for small and medium scale cultures of a variety of cells, including bacterial, insect, and mammalian cell lines. We are currently specializing in the use of the baculovirus expression system, a widely used and versatile eukaryotic system which has been used to successfully express thousands of proteins. Depending upon the level of expression of a given protein, quantities ranging from hundreds of micrograms to tens of milligrams may be readily produced using resources at the facility. In addition, the Center is also equipped to perform purification of expressed recombinant proteins.