....e., Gag, Pol, and Env), the isoforms of these proteins, as well as the viral LTRs, differ. As a result...cell line developed by Garry Nolan at Stanford contains Gag-Pol and either an ecotropic envelope, Phoenix-ECO... just a few days. Another variant, Phoenix-gp, contains only Gag-Pol and enables additional flexibility...transduction are not encoded by the transfer plasmid, but instead are provided in trans by other plasmids or the ...Cloning capacity between the LTRs is ∼8.5kb, but inserts bigger than ∼3kb are packaged less efficiently....found at both the 5' and 3' ends of the provirus). Contains sequences necessary for activation of viral genomic... Acts as an RNA pol II promoter. The transcript begins, by definition, at the beginning of R, is capped...