结构基因( Strucutre genes) Gene Encoded Protein Function of Protein gag P24, p7 Nucleocapsid p17 Matrix pol Reverse transcriptase transcribes RNA genome into DNA Protease Cleaves precusor polypeptides Integrase Integrates viral dNa into host cel DNA env gp120 Attachment to CD40 protein gp4 1 Fusion with host cell结构基因（Strucutre Genes） Gene Encoded Protein Function of Protein gag P24, p7 Nucleocapsid p17 Matrix pol Reverse transcriptase Transcribes RNA genome into DNA Protease Cleaves precusor polypeptides Integrase Integrates viral DNA into host cell DNA env gp120 Attachment to CD40 protein gp41 Fusion with host cell