Fig. 6.

The BUNV S segment harbours an RVFV-like termination signal. Schematic of the BUNV S segment, highlighting the originally described T1 transcription-termination sequence (nt 841–873) in genomic (−ve) sense, and the sequence of the mRNA 3′ end (+ve sense). The previously described pentanucleotide (Barr et al., 2006) is shaded, and the RVFV-like pentanucleotide is underlined. The 3′ end of the mRNA is in the region of nt 857–861 as indicated by arrows. Deletions in the S genomes of recombinant viruses rBUNVΔT1 and rBUNVΔGU are shown below.