[i] Statistics for annotated genes and newly discovered transcripts in the three main gene expression classes. Shown is the number of genes having “early” and/or “late” promoter elements (see main text) in 5′ upstream region, a palindromic transcription termination signal (Byrne et al. 2009), and protein product detected in the virus particle proteome (Renesto et al. 2006; Claverie et al. 2009a). The last column shows χ² test P-value for equipartition.