id author title date pages extension mime words sentences flesch summary cache txt cord-284707-72vx11aq Leibowitz, Julian L. Synthesis of virus-specific RNA in permeabilized murine coronavirus-infected cells 1988-09-30 .txt text/plain 5498 316 53 For mouse hepatitis virus (MHV), one of the most extensively studied coronaviruses, there are seven species of MHV-specific mRNA present in infected cells, the largest of which is indistinguishable from virion RNA (Leibowitz et a/., 1981; Lai et a/., 1981; Spaan et a/., 1981) . In this paper we report the characteristics of a permeabilized cell system and demonstrate that it incorporates ribonucle-otide triphosphates into RNA molecules which appear identical to the virus-specific mRNAs synthesized in MHV-infected cells. Protease inhibitors and RNase inhibitors have both been reported to increase the RNA-dependent RNA polymerase activity present in extracts of West Nile virus-infected cells (Grun and Brinton, 1986) . The kinetics of the development of the MHV-specific RNA polymerase activity over the course of infection was determined in permeabilized cells. In this work we report the development and characterization of a permeabilized cell system for assaying MHV-specific RNA polymerase activity. ./cache/cord-284707-72vx11aq.txt ./txt/cord-284707-72vx11aq.txt