Figure 1From: Evidence for preferential copackaging of Moloney murine leukemia virus genomic RNAs transcribed in the same chromosomal siteStructures of Mo-MuLV-based retroviral vectors used in this study. U3, R, U5, regions of long terminal repeat; SV, simian virus 40 early promoter region; ψ+, extended packaging signal; Neo, neomycin phosphotransferase gene; Puro, puromycin N-acetyltransferase gene. Δpbs and ΔEP indicate that the entire primer binding site and enhancer-promoter sequences from the U3 region are deleted.Back to article page