Neighbor-joining phylogenetic analysis. Using MEGA 4.0 of the complete genome of isolates of the West and Central African betasatellites and other betasatellite isolates from the NCBI GenBank. Horizontal lines are in proportion to the number of nucleotide substitutions per site. Numbers represent at the branch nodes are percent bootstrap values out of 2,000 replicates. The abbreviations are according to Briddon et al. .