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This slide offers three different schematic concepts for how the genes of Avian Sarcoma Virus are transcribed into messenger RNA, which carries the genes' instructions for making proteins to the protein-building machinery outside the cell nucleus. In particular, Varmus here tries to assess the role of the promoter, a segment of DNA upstream of a gene coding region (here a viral gene) that acts as a controlling element in the expression of that gene.
Original Repository:
University of California, San Francisco. Archives and Special Collections. Harold E. Varmus Papers
Location:
Box: 7. Folder: 5
Rights:
Reproduced with permission of the Regents of the University of California.