Fig.18.8 Life cycle of a nononcogenic retrovirus -Nononocogenic retrovirus Infection Bag pol eny Viral RNA LTR DNA synthesis by reverse transcriptase gag pol env Proviral DNA LTR LTR Integration into genome 重g g pol env LTR LTR Transcription mRNA gag pol gag pol env Viral RNA LTR LTR LTR Translation Packing into virus particles at and release PeterJ.Russell,iGenetics Copyright Pearson Education,Inc,publishing as Berjamin Cummings. 言六三尊元息厚导60120000C0ptt18dide19