51. The Recombinant DNA Act

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52. Letter from Paul Berg to Daniel Nathans

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

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54. Daniel Nathans in his lab coat, gesturing with pipe

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55. Candid photo of Daniel Nathans

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56. Daniel Nathans working in lab

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57. Daniel Nathans and Hamilton Smith in the lab

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58. Letter from Paul Berg to Daniel Nathans

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

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60. 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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61. Letter from U.S. Representative Ray Thornton to Daniel Nathans

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62. Letter from Daniel Nathans to Ernest Winocour

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63. Letter from Ernest Winocour to Daniel Nathans

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64. Biological Activities of Deletion Mutants of Simian Virus 40

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65. Letter from Roy D. Schmickel to Daniel Nathans

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66. Letter from Daniel Nathans to Paul Berg

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67. Letter from Paul Berg to Daniel Nathans

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68. Letter from Roy D. Schmickel to Ching-Juh Lai

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69. A Molecular Approach to Carcinogenesis: Dissecting the Genome of a Small Tumor Virus

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70. Letter from Daniel Nathans to Wallace P. Rowe

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71. Letter from Roy D. Schmickel to Daniel Nathans

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72. Letter from Daniel Nathans to Roy D. Schmickel

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73. Letter from Roy D. Schmickel to Daniel Nathans

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74. Evolutionary Variants of Simian Virus 40: Cloned Substituted Variants Containing Multiple Initiation Sites for DNA Replication

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75. Letter from Daniel Nathans to Aaron J. Shatkin

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76. Letter from Wallace P. Rowe to Aaron J. Shatkin

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77. Letter from David A. Jackson to Aaron J. Shatkin

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78. A Transcriptional Map of the SV40 Genome in Transformed Cell Lines

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79. Letter from Neal Nathanson to Aaron J. Shatkin

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80. Letter from Daniel Nathans to Janet E. Mertz

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81. Letter from Janet E. Mertz to Daniel Nathans

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82. Letter from Aaron J. Shatkin to Daniel Nathans

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83. Letter from Roy D. Schmickel to Daniel Nathans

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84. Letter from Daniel Nathans to Janet E. Mertz

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85. Letter from Janet E. Mertz to Daniel Nathans

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86. The Isolation of Simian Virus 40 Variants with Specifically Altered Genomes

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87. A Colinear Map Relating the Simian Virus 40 (SV40) DNA Segments of Six Adenovirus-SV40 Hybrids to the DNA Fragments Produced by Restriction Endonuclease Cleavage of SV40 DNA

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88. Letter from Daniel Nathans to Ray Wu

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89. Letter from Daniel Nathans to Bernard Weisblum

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90. Letter from Ray Wu to Daniel Nathans

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91. Letter from Bernard Weisblum to Daniel Nathans

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92. Data on SV, JC, and BK cleavage

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93. Letter from Daniel Nathans to David McConnell

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94. Letter from David McConnell to Daniel Nathans

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95. Letter from Daniel Nathans to Paul Berg

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96. Letter from Maurice R. Hilleman to Paul Berg

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97. Letter from Paul Berg to Daniel Nathans

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98. Letter from Daniel Nathans to Larry Gold

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99. Letter from Larry Gold to Daniel Nathans

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100. Letter from Ernest Winocour to Daniel Nathans

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