| the maastricht strain and england strain of rat cytomegalovirus represent different betaherpesvirus species rather than strains. | the major immediate early (mie) locus of the maastricht strain of rat cytomegalovirus (rcmv) was found to comprise five exons of which the first is noncoding. the first three exons are spliced to either exon 4, generating ie1, or exon 5, generating ie2. an additional splicing event unique to rcmv (maastricht) was identified in exon 5, resulting in a 466-bp deletion. ie1 transcripts were detected exclusively during the ie phase of infection in vitro, whereas ie2 transcripts were detected during b ... | 1998 | 9657952 |