In contrast from nt 6,550 to the 39 end (stretch III in Fig. 4) , the N10 strain genome was found to be closely related to that of N4, with nucleotide identity .98%. This result is corroborated in Figure 5 , which shows a phylogenetic analysis of the 39UTR sequences of N10 and N4 compared to those of HRV-Ca subspecies and HRV-A and HRV-B species. This suggests that N4 and N10 strains share a common recent ancestor through recombination. 1 and 2 ) and on local recombination in 59UTR (see Fig. 3 ). b Strains closely related with more than 93% identity. c These strains clustered differently when based on VP4/VP2 sequences (see Table 2 and Figs. 1 and 2) . doi:10.1371/journal.pone.0006355.t003