Objective To study sequence variation of V3 loop of HIV-1 strains prevalent in China.
目的研究中国艾滋病病毒1型（HIV-1）毒株V3环序列的变异性。
There were obvious differences between X4/SI and R5/NSI viruses in env V3 loop sequences.
SI病毒和R5 /NSI病毒在V3环氨基酸序列方面，存在明显的区别。
There were obvious differences between X4/SI and R5/NSI viruses in env V3 loop sequences.
SI病毒和R5 /NSI病毒在V3环氨基酸序列方面，存在明显的区别。
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