1. Daniel Nathans as teenager, leaning on tree stump

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2. Daniel Nathans as college student

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3. Excerpt from Washington University lab notebook

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4. Iron Clearance and Utilization in Rats Using a Direct Method of Counting Fe59

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5. Effect of ACTH on Distribution of Ascorbic Acid in Rat Adrenal Gland as Determined by Direct Microchemical Analysis

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6. Lab notebook entry from notebook "Mouse Myeloma"

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7. Letter from Peyton Rous to Daniel Nathans

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8. The Formation of Myeloma Protein by a Mouse Plasma Cell Tumor

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9. Purification of a Supernatant Factor That Stimulates Amino Acid Transfer from Soluble Ribonucleic Acid to Protein

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10. Amino Acid Transfer from Aminoacyl-Ribonucleic Acids to Protein on Ribosomes of Escherichia Coli

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11. Biosynthesis of the Coat Protein of Coliphage f2 by E. Coli Extracts

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12. Puromycin Inhibition of Protein Synthesis: Incorporation of Puromycin into Peptide Chains

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13. Bacteriophage-Specific Proteins in E. Coli Infected with an RNA Bacteriophage

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14. Experiment 2: Polymer Synthesis After Infection

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15. Experiment I: Single Cycle Growth Curves

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16. DNA-RNA Hybridization and "RNA Polymerase Purification"

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17. SV 40 Prep

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18. Letter from Daniel Nathans to W. Barry Wood

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19. Letter from W. Barry Wood to Daniel Nathans

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20. Letter from Daniel Nathans to Roy D. Schmickel

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21. Letter from Roy D. Schmickel to Daniel Nathans

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22. SV 40 Prep

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23. Letter from Ernest Winocour to Daniel Nathans

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24. Letter from Daniel Nathans to Ernest Winocour

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25. Lab notes on identifying SV 40 proteins in infected cells

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26. Memorandum from Lincoln Gordon to the Faculties of Medicine and Hygiene and Public Health [on The Johns Hopkins University program in the Allied Health Sciences]

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27. Memorandum from Daniel Nathans to W. Barry Wood

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28. Memorandum from W. Barry Wood to David E. Rogers

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29. Daniel Nathans sitting in his lab

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30. Daniel Nathans in cold lab

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31. Lab notes on determining fragments made by Hind on SV 40 DNA

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32. Letter from David C. Ward to Daniel Nathans

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33. Letter from Daniel Nathans to David C. Ward

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34. Letter from Daniel Nathans to David C. Ward

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35. Lab notes on transformation of BALB 3T3

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36. Letter from David C. Ward to Daniel Nathans

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37. Letter from Daniel Nathans to David C. Ward

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38. Letter from David C. Ward to Daniel Nathans

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39. Lab notes of electron microscopic images of E. coli B DNA

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40. Letter from Ernest Winocour to Daniel Nathans

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41. Specific Cleavage of Simian Virus 40 DNA by Restriction Endonuclease of Hemophilus Influenzae

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42. Letter from Daniel Nathans to Ernest Winocour

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43. Daniel Nathans with faculty of the Department of Microbiology at Johns Hopkins University School of Medicine

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44. Letter from Maxine Singer to Daniel Nathans

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45. Letter from Daniel Nathans to Maxine Singer

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46. Letter from Maxine Singer to Daniel Nathans

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47. Letter from Ernest Winocour and Maxine Singer to Daniel Nathans

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48. Letter from Daniel Nathans to Ernest Winocour and Maxine Singer

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49. Letter from Kathleen J. Danna to Daniel Nathans

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50. Bidirectional Replication of Simian Virus 40 DNA

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