Temporal regulation of RNA synthesis of bovine coronavirus.

Abstract

It has been shown with mouse hepatitis virus (MHV) and avian infectious bronchitis virus that all of the subgenomic mRNAs and genomic RNA are synthesized at the same rate throughout the viral replication cycle (Leibowitz et al., 1981; Stern and Kennedy, 1980). The viral genomic RNA gradually accumulates late in infection. However, no clear switching from transcription of subgenomic mRNAs to replication of genomic-sized RNA is seen. Thus, it is not known whether there is a temporal regulation of viral RNA synthesis in coronavirus-infected cells.