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. 2011 Jan 31;6(1):e16551. doi: 10.1371/journal.pone.0016551

Figure 4. Frequency and distribution of the sites under significant positive and negative selection pressure inE1/E2.

Figure 4

The bars indicate the number of patients (y axis) showing positive (filed bars-upward) or negative (striped bars-downward) selection at each site (x axis).