Positions of PNGS within the Env V1-V5 region that differed between paired mothers and infantsa.

aPositions within the Env V1-V5 region where a PNGS was absent in infant variants but present in the paired mother variants.bThe PNGS positions are numbered according to the HXB2 amino acid sequence.cChanges in the number of PNGS occurred as a result of either insertion/deletions (I/D) or mutation (M).