1. Directed Mutagenesis

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2. Letter from Daniel Nathans to William F. Harrington

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3. The Gordon Wilson Lecture: The New Genetics

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4. Letter from Daniel Nathans to I. Arita

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5. Letter from Oliver H. Lowry to Daniel Nathans

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6. Local Mutagenesis: A Method for Generating Viral Mutants with Base Substitutions in Preselected Regions of the Viral Genome

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7. Letter from Daniel Nathans to Paul Berg

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8. The Recombinant DNA Act

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9. Letter from Paul Berg to Daniel Nathans

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10. Draft of letter on recombinant DNA legislation (with edits by Daniel Nathans)

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11. Letter from Paul Berg to Daniel Nathans

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12. Draft of letter on recombinant DNA legislation (with edits by Daniel Nathans)

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13. Testimony before the House Subcommittee on Science, Research, and Technology. March 30, 1977. Daniel Nathans, Professor and Director, Department of Microbiology, Johns Hopkins University School of Medicine

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14. Letter from U.S. Representative Ray Thornton to Daniel Nathans

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15. Letter from Daniel Nathans to Ernest Winocour

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16. Letter from Ernest Winocour to Daniel Nathans

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17. Biological Activities of Deletion Mutants of Simian Virus 40

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18. Letter from Roy D. Schmickel to Daniel Nathans

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19. Letter from Daniel Nathans to Paul Berg

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20. Letter from Paul Berg to Daniel Nathans

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