Types of nucleotide substitutions in R5 and X4 pseudotyped virus infections.

Underlined = transversions, italics = transitions. Infections of stimulated T CD4 + cells and stimulated and non- stimulated PBMCs by R5 pseudotypes did not result in changes at the most probable nucleotide.
Mutated positions and the frequency of replaced nucleotides in the proviral population per experimental conditions.

下划线标注为碱基颠换（transversion），斜体标注为碱基转换（transition）。
R5假型病毒（R5 pseudotypes）感染活化CD4+ T细胞、活化与未活化的外周血单个核细胞（PBMC）后，最可能的核苷酸位点未发生改变。
不同实验条件下，前病毒群体中的突变位点及替换核苷酸的频率。