16.4 Yeast Ty elements resemble retroviruses RNA form of v irus 1080RU59ag yU308 2000~2900~1800 80-100 ∠7n12RR Figure 16.5 Retroviral Linear dNA form of virus RNA ends in direct 3 RU5 g env U3 R repeats(R), the free 250-1400bp linear dna ends in Integrated DNA form of virus LTRS. and the U3 has lost 2 b U5 has lost 2 bp provirus ends in ltrs that are shortened by Hos八03R9gpo U3 RU5. Host two bases each 4-6 bp repeat of 4-6 bp repeat of target DNA target dna 消当Figure 16.5 Retroviral RNA ends in direct repeats (R), the free linear DNA ends in LTRs, and the provirus ends in LTRs that are shortened by two bases each. 16.4 Yeast Ty elements resemble retroviruses