image PNGS positions are aligned according to hxb2 aminoacid numeration. The aminoacid numeration is reported only for conserved PNGS. Squares point out the increase of frequency of shifting PNGS.
RS= Recent disease Stage; CS= Chronic disease Stage; LS= Late disease Stage.
Figure 4: Analysis of PNGSs pattern in V1, V2, V4 and V5 regions.
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