261. Letter from Harold Varmus to Howard Young, National Cancer Institute

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262. Letter from Harold Varmus to Roel Nusse

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263. Memorandum of Understanding and Agreement: Recombinant DNA

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264. Report from Cold Spring Harbor, 1979: Viral Oncogenes (and Other Items)

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265. For the ICRF Annual Report, 1979: II. Retroviruses as Mutagens: Isolation of Revertants with Deletions and/or Insertions in the ASV Provirus in B31 Cells after Superinfection with MuLV

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266. For the ICRF Annual Report, 1979: I. The Rare Revertants of an ASV-Transformed Rat Cell Have Lost Proviral DNA or Bear Mutations in SRC

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267. For the ICRF Annual Report, 1979: III. Co-Transfection with Papovavirus and Retrovirus DNA Using Recombinant DNA Prepared In vitro

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268. Letter from Harold Varmus to Inder M. Verma, Imperial Cancer Research Fund Laboratories

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269. Letter from Keith R. Yamamoto to Harold Varmus

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270. Nucleotide Sequences Related to the Transforming Gene of Avian Sarcoma Virus are Present in DNA of Uninfected Vertebrates

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271. Letter from Harold Varmus to J. Michael Bishop

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272. Letter from Harold Varmus to Mike Fried, Imperial Cancer Research Fund Laboratories

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273. Letter from Ed Southern, Medical Research Council of Great Britain to Harold Varmus and Stephen Hughes

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274. Letter from Harold Varmus and Stephen Hughes to Ed Southern, Medical Research Council of Great Britain

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275. [Revertant DNA data] (image 2)

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276. [Revertant DNA data] (gel 1)

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277. [Revertant DNA data] (gel 2)

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278. [Revertant DNA data] (gel 3)

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279. [Revertant DNA data] (image 3)

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280. Varieties of RNA Tumor Virus-Specific DNA in Cells

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