Roeder, G. E., Parish, J. L., Stern, P. L., & Gaston, K. (2004). Herpes simplex virus VP22-human papillomavirus E2 fusion proteins produced in mammalian or bacterial cells enter mammalian cells and induce apoptotic cell death. Biotechnology and Applied Biochemistry, 40(2), 157-165. https://doi.org/10.1042/BA20030172