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===Recognition of her contribution to the Crick and Watson model=== ===Recognition of her contribution to the Crick and Watson model===
On the completion of their model, Francis Crick and James Watson had invited Mauri171 pp. 737-738</ref>
On the completion of their model, Francis Crick and James Watson had invited Maurice Wilkins to be a ] of their paper describing the structure.<ref>The Third Man of the Double Helix, p. 213</ref><ref>Rosalind Franklin: The Dark Lady of DNA, p. 205</ref> Maurice Wilkins turned down this offer, as he had taken no part in building the model.<ref>The Third Man of the Double Helix, p. 214</ref> Maurice Wilkins later expressed regret that greater discussion of co-authorship had not taken place as this may have helped to clarify the contribution the work at King's had made to the discovery.<ref>The Third Man of the Double Helix, p. 226</ref> There is no doubt that Rosalind Franklin's experimental data were used by Crick and Watson to build their model of DNA in 1953 (see above). That she is not cited in their original paper outlining their model may be a question of circumstance, it would have been very difficult to cite the unpublished work from the MRC report they had seen.<ref>Rosalind Franklin: The Dark Lady of DNA, p. 207</ref> It should be noted that the x-ray diffraction work of both Maurice Wilkins and ] are cited in the paper, and that the unpublished work of both Rosalind Franklin and Maurice Wilkins are acknowledged in the paper. <ref>Crick, F. H. C. and Watson, J. D. (1953) '''', ''Nature'' 171 pp. 737-738</ref>
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===Nobel Prize=== ===Nobel Prize===

Revision as of 13:14, 29 June 2006

Double helix

Rosalind Elsie Franklin (25 July, 1920 – 16 April, 1958) was a British physical chemist and crystallographer who made important contributions to the understanding of the fine structures of DNA, viruses, coal and graphite.Rosalind Franklin is best known for her contribution to the discovery of the structure of DNA in 1953. She was 37 years old when she died of ovarian cancer in 1958.

Background

Franklin was born in London into an affluent and influential British-Jewish family. Her great uncle was Herbert Samuel (later Viscount Samuel) who was the first practicing Jew to serve in the British Cabinet, as Home Secretary in 1916. He was also the first High Commissioner (effectively governor) for the British Mandate of Palestine. Her aunt Helen was married to Norman Bentwich who was Attorney General in the British Mandate of Palestine and was active in trade union organization and women's suffrage, she was later a member of the London County Council. Rosalind's uncle Hugh Franklin was also a supporter of women's suffrage, and spent six weeks in prison in 1910 for attacking Winston Churchill with a dog whip because of Churchill's oppostion to this cause. Rosalind Franklin was educated at St Paul's Girls' School where she excelled in biology and sport. Her family were actively involved with a Working Men's College, where Ellis Franklin, her father, taught electricity, magnetism and the history of the Great War in the evenings and later became vice principal. Later they helped settle Jewish refugees from Europe who had escaped the Nazis.

Education and career

University education and work at British Coal Utilisation Research Association

In the Summer of 1938 Franklin went to Newnham College, Cambridge. She passed her finals in 1941, but was only awarded a decree titular, women were not entitled to degrees (BA Cantab.) from Cambridge at the time. She worked for Ronald Norish between 1941 and 1942. Because of her desire to do war work during World War II, she worked at the British Coal Utilisation Research Association in Kingston-upon-Thames from August 1942, studying the porosity of coal. Her work helped spark the idea of high-strength carbon fibres and was the basis of her doctoral degree "The physical chemistry of solid organic colloids with special reference to coal and related materials" that she earned in 1945.

Work at Laboratoire central des services chimiques de l'État

After the war ended Franklin accepted an offer to work in Paris with Jaques Mering. She learned x-ray diffraction techniques during her three years at the Laboratoire central des services chimiques de l'État. She seemed to have been very happy there and earned an international reputation based on her published research about the structure of coal. In 1950 she sought work in England. and in June 1950 she was appointed to a position at King's College London.

Work at King's College London

Franklin started working as a research associate at King's College London in the Medical Research Council's (MRC) Biophysics Unit, directed by John Randall, at the beginning of January 1951. Originally to have worked on x-ray diffraction of proteins in solution, her work was redirected to DNA fibres before she started working at King's. Maurice Wilkins and Raymond Gosling had been carrying out x-ray diffraction analysis of DNA in the Unit since 1950. Template:Single strand DNA discovery2 Franklin, working with her student Raymond Gosling started to apply the expertise she had gained in x-ray diffraction techniques to the structure of DNA. They discovered that there were two forms of DNA, at high humidity (when wet) the DNA fibre became long and thin, when it was dried it became short and fat. These were termed DNA 'B' and 'A' respectively. The work on DNA was subsequently divided, Franklin taking the A form to study and Wilkins the 'B' form. The x-ray diffraction pictures taken by Franklin at this time have been called, by J. D. Bernal, "amongst the most beautiful x-ray photographs of any substance ever taken".

File:Rosalindfranklinsjokecard.jpg
Franklin and Gosling death notice for a helical structure for crystalline DNA (or A-DNA)

By the end of 1951 it was generally accepted in King's that the B form of DNA was a helix, but Franklin in particular was unconvinced that the A form of DNA was helical in structure. As a practical joke Franklin and Gosling produced a death notice regretting the loss of helical crystalline DNA (A-DNA). During 1952 Rosalind Franklin and Raymond Gosling worked at applying the Patterson function to the x-ray pictures of DNA they had produced, this was a long and labour-intensive approach but would give an insight into the structure of the molecule.

In February 1953 Francis Crick and James Watson of the Cavendish Laboratory in Cambridge University had started to build a model of the B form of DNA using similar data to that available to the team at King's. Model building had been applied succesfully in the elucidation of the structure of the alpha helix by Linus Pauling in 1951, but Rosalind Franklin was opposed to building theoretical models, taking the view that building a model was only to be undertaken after the structure was known.

Francis Crick and James Watson published their model in Nature on 25 April 1953 in an article describing the double-helical structure of DNA. Articles by Maurice Wilkins and Rosalind Franklin illuminating their x-ray diffraction data published in the same issue of Nature supported the Crick and Watson model for the B form of DNA. Rosalind Franklin eventually left King's College London in March 1953 to move to Birkbeck College in a move that had been planned for some time.

DNA structure research at King's College London 1947–1959

Work at Birkbeck College, London

Electronmicrograph of Tobacco Mosaic Virus

Franklin's work in Birkbeck involved the use of x-ray crystallography to study the structure of the tobacco mosaic virus (TMV) under J. D. Bernal and was funded by the Agricultural Research Council(ARC). In 1954 Franklin began a longstanding and successful collaboration with Aaron Klug. In 1955 Franklin had a paper published in the journal Nature, indicating that TMV virus particles were all of the same length, this was in direct contradiction to the ideas of the eminent virologist Norman Pirie, though her observation ultimately proved correct.

Rosalind Franklin worked on rod like viruses such as TMV with her Ph.D. student Kenneth Holmes, while Aaron Klug worked on spherical viruses with his student John Finch, Rosalind Franklin coordinated the work and was in charge. Rosalind Franklin also had a research assistant, James Watt, subsidised by the National Coal Board and was now the Leader of the "ARC Group" at Birkbeck. By the end of 1955 her team had completed a model of the TMV and were working on viruses affecting several plants, including potato, turnip, tomato and pea. Rosalind Franklin and Don Casper produced a paper each in Nature that taken together demonstrated that the RNA in TMV is wound along the inner surface of the hollow virus.

Final work, illness and death

In the summer of 1965, while on a work related trip to the 5raq Franklin first began to suspect a health problem,. An operation in September of the same year revealed 2 b5356n t4n6r s4c2ed c6c2 and d5ed 6f rab5es tumours in her abdomen. After this period of illness Rosalind Franklin spent some time convalescing at the home of Francis Crick and his wife Odile. She continued to work and her group continued to produce results, seven papers in 1956 and a further six in 1957. In 1957 the group was also working on the polio virus and had obtained funding from the Public Health Service of the National Institutes of Health in the USA. At the end of 1957 Franklin again fell ill and was admited to the Royal Marsden Hospital. She returned to work in January 1958 and was given a promotion to Research Associate in Biophysics. She fell ill again on the 30th of March and died on the 16th of April of ovarian cancer. Exposure to x-ray radiation is considered a possible factor in her illness.

Controversies surrounding Rosalind Franklin

Various controversies have surrounded Rosalind Franklin; these have all come to light after her death.

Allegations of sexism at King's College

There have been allegations that Rosalind Franklin was discriminated against because of her gender:

One of the allegations is that King's, as an institution, was sexist, the thrust of the allegation being that women were excluded from the staff dining room, and had to eat their meals in the student hall or away from the University. This does not appear to be the whole story. Whereas it is true that there was a dining room for the exclusive use of men (as was the case at other University of London colleges at the time), there was also a mixed gender dining room that overlooked the river Thames, and many male scientists refused to use the male only dining room, due to the preponderance of theologians.

The other accusation regarding gender is that women were under-represented in John Randall's group, the claim is that there was only one other woman in the group and that the women were excluded because of their gender. In fact women seem to have been (by the standards of the time) exceptionally well-represented in the group, representing eight out of thirty-one members of staff, or possibly closer to one in three.

Rosalind Franklin's contribution to the Crick and Watson model of DNA

Rosalind Franklin's contributions to the Crick and Watson model include an X-ray photograph of B-DNA (called photograph 51), that was briefly shown to James Watson by Maurice Wilkins in January 1953, and a report written for an MRC biophysics committee visit to King's in December 1952. The report contained unpublished data from the King's group, including Rosalind Franklin's work, and was given to Francis Crick by his thesis supervisor Max Perutz, a member of the visiting committee. Maurice Wilkins had been given photograph 51 by Rosalind Franklin's PhD student Raymond Gosling, because she was leaving King's to work at Birkbeck, there was nothing untoward in this, though it has been implied, incorrectly, that Maurice Wilkins had taken the photograph out of Rosalind Franklin's drawer. Likewise Max Perutz saw no harm in showing the MRC report to Francis Crick as it had not been marked as confidential. The upshot of all this was that when Francis Crick and James Watson started to build their model in February 1953 they were working with very similar data to those available at King's. Rosalind Franklin was probably never aware that her work had been used during construction of the model.

Recognition of her contribution to the Crick and Watson model

On the completion of their model, Francis Crick and James Watson had invited Mauri171 pp. 737-738</ref> y64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahahy64 are all old pieces of shit! hahahahahahahhahahahhahahahhahah bitch!!!!!1

Nobel Prize

The rules of the Nobel Prize forbid posthumous nominations. Rosalind Franklin had died in 1958, Francis Crick, James Watson and Maurice Wilkins won their Nobel Prize in 1962. The award was given for work on nucleic acids and not exclusively for the discovery of the structure of DNA. By the time of the award Maurice Wilkins had been working on the structure of DNA for over ten years, and had done much to confirm the Crick-Watson model. Francis Crick had been working on the genetic code at Cambridge. James Watson had worked on RNA for some years. The Nobel Prize was awarded in recognition of these contributions in addition to the proposal of a structure for DNA.

Posthumous recognition


References

  1. Rosalind Franklin: The Dark Lady of DNA, p. 3
  2. ^ Rosalind Franklin: The Dark Lady of DNA, p. 7
  3. Segev, Tom (2000): One Palestine, Complete, (ISBN 034911286X). Abacus History.
  4. ^ Rosalind Franklin and DNA, p. 31
  5. ^ Rosalind Franklin: The Dark Lady of DNA, p. 40
  6. Rosalind Franklin: The Dark Lady of DNA, p. 28
  7. Rosalind Franklin: The Dark Lady of DNA, p. 25
  8. Rosalind Franklin and DNA, p. 41
  9. Rosalind Franklin: The Dark Lady of DNA, p. 30
  10. Rosalind Franklin: The Dark Lady of DNA, p. 26
  11. Rosalind Franklin: The Dark Lady of DNA, p. 20
  12. Rosalind Franklin and DNA, p. 35
  13. Rosalind Franklin: The Dark Lady of DNA, p. 40
  14. Rosalind Franklin and DNA p. 47
  15. Rosalind Franklin: The Dark Lady of DNA, p. 67
  16. Rosalind Franklin: The Dark Lady of DNA, p.44
  17. Rosalind Franklin and DNA p. 50
  18. Rosalind Franklin: The Dark Lady of DNA, p. 70
  19. ^ Rosalind Franklin and DNA p. 57
  20. Rosalind Franklin: The Dark Lady of DNA, p. 79
  21. Rosalind Franklin: The Dark Lady of DNA, p. 78
  22. Rosalind Franklin: The Dark Lady of DNA, p. 82
  23. Rosalind Franklin: The Dark Lady of DNA, page 87
  24. Rosalind Franklin: The Dark Lady of DNA, p. 88
  25. Rosalind Franklin: The Dark Lady of DNA, p. 92
  26. R. E. Franklin: "Influence of the bonding electrons on the scattering of X-rays by carbon", Nature (1950) volume 165 page 71 Template:Entrez Pubmed
  27. Rosalind Franklin: The Dark Lady of DNA, p. 108
  28. Rosalind Franklin: The Dark Lady of DNA, p. 111
  29. Rosalind Franklin: The Dark Lady of DNA, p. 124
  30. Rosalind Franklin: The Dark Lady of DNA, p. 114
  31. The Third Man of the Double Helix, pp. 143-144
  32. The Third Man of the Double Helix, p. 121
  33. Rosalind Franklin: The Dark Lady of DNA, p. 129
  34. Rosalind Franklin: The Dark Lady of DNA, p. 153
  35. The Third Man of the Double Helix, p. 154
  36. The Third Man of the Double Helix, p. 158
  37. Rosalind Franklin: The Dark Lady of DNA, p. 155
  38. Rosalind Franklin: The Dark Lady of DNA, p. 153
  39. The Third Man of the Double Helix, p. 176
  40. The Third Man of the Double Helix, p. 182
  41. Rosalind Franklin: The Dark Lady of DNA, p. 168
  42. Rosalind Franklin: The Dark Lady of DNA, p. 169
  43. The Third Man of the Double Helix, pp. 232-233
  44. Rosalind Franklin: The Dark Lady of DNA, p. 147
  45. The Third Man of the Double Helix, p. 158
  46. Rosalind Franklin: The Dark Lady of DNA, p. 161
  47. The Third Man of the Double Helix, p. 176
  48. Rosalind Franklin: The Dark Lady of DNA, p. 212
  49. R. Franklin and R. G. Gosling:Molecular Configuration in Sodium Thymonucleate, Nature (1953) volume 171 pages 740-741.full text
  50. Rosalind Franklin: The Dark Lady of DNA, p. 210
  51. Rosalind Franklin: The Dark Lady of DNA, p. 168
  52. Rosalind Franklin: The Dark Lady of DNA, p. 229
  53. Rosalind Franklin: The Dark Lady of DNA, p. 235
  54. Rosalind Franklin: The Dark Lady of DNA, p. 249
  55. Franklin, R.E. (1955) Structure of tobacco mosaic virus. Nature 175:379-381
  56. Rosalind Franklin: The Dark Lady of DNA, p. 252
  57. Rosalind Franklin: The Dark Lady of DNA, p. 254
  58. Rosalind Franklin: The Dark Lady of DNA, p. 256
  59. Rosalind Franklin: The Dark Lady of DNA, p. 262
  60. Rosalind Franklin: The Dark Lady of DNA, p. 269
  61. Franklin, R.E. (1956) Location of the ribonucleic acid in the tobacco mosaic virusparticle. Nature 177:928
  62. Rosalind Franklin: The Dark Lady of nda, p. 284
  63. Rosalind Franklin: The Dark Lady of DNA, p. 285
  64. Rosalind Franklin: The Dark Lady of DNA, p. 288
  65. Rosalind Franklin: The Dark Lady of DNA, p. 292
  66. Rosalind Franklin: The Dark Lady of DNA, p. 296
  67. Rosalind Franklin: The Dark Lady of DNA, p. 302
  68. Rosalind Franklin: The Dark Lady of DNA, p.305
  69. Rosalind Franklin: The Dark Lady of DNA, p.307
  70. Rosalind Franklin and DNA, p.97
  71. Bryson, B. A Short History of Nearly Everything. (2004), page 490. Black Swan edition 0 552 99704 8
  72. Rosalind Franklin: The Dark Lady of DNA, p. 128
  73. Rosalind Franklin and DNA, p.99
  74. Rosalind Franklin: The Dark Lady of DNA, p. 133
  75. The Third Man of the Double Helix, p. 256
  76. Rosalind Franklin: The Dark Lady of DNA, pp. 177-178
  77. Rosalind Franklin: The Dark Lady of DNA, p. 196
  78. Crick, F. H. C. What Mad Pursuit, p67 ISBN 0465091377
  79. Elkin, L.O. Rosalind Franklin and the Double Helix Physics Today March 2003, p. 61
  80. Rosalind Franklin: The Dark Lady of DNA, pp. 198-199
  81. Rosalind Franklin: The Dark Lady of DNA, pp. 196
  82. The Third Man of the Double Helix, p. 198
  83. The Third Man of the Double Helix, p. 257
  84. Rosalind Franklin: The Dark Lady of DNA, p. 199
  85. Rosalind Franklin: The Dark Lady of DNA, p. 316
  86. Rosalind Franklin: The Dark Lady of DNA, p. 205
  87. The Nobel Prize in Physiology or Medicine 1962, for their discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material, Nobelprize.org
  88. ^ The Third Man of the Double Helix, p. 242
  89. The Third Man of the Double Helix, p. 240
  90. ^ The Third Man of the Double Helix, p. 243
  91. ^ Rosalind Franklin: The Dark Lady of DNA, p. 322
  92. Sir Aaron Klug opens new Laboratory
  93. Rosalind Franklin: The Dark Lady of DNA, p. 323
  94. dedication of Rosalind Franklin University

Bibliography

  • Maddox, Brenda Rosalind Franklin: The Dark Lady of DNA, 2002. ISBN 0006552110.
  • Wilkins, Maurice, The Third Man of the Double Helix, an autobiography ISBN 0192806673.
  • Sayre, Anne. 1975. Rosalind Franklin and DNA. New York: W.W. Norton and Company. ISBN 0393320448.

Further reading

  • Watson, James D. (1980). The double helix: A personal account of the discovery of the structure of DNA. Norton. ISBN 0-3930-1245-X.
  • Robert Olby, "The Path to The Double Helix: Discovery of DNA", (1974). MacMillan ISBN 046681173
  • Chomet, S. (Ed.), D.N.A. Genesis of a Discovery, (1994). Newman- Hemisphere Press.
  • Crick, Francis, What Mad Pursuit: A Personal View of Scientific Discovery (1990), Basic Books. ISBN 0465091385
  • Krude, Torsten (Ed.) DNA Changing Science and Society: The Darwin Lectures for 2003 CUP 2003, includes a lecture by Sir Aaron Klug on Rosalind Franklin's involvement in the determination of the structure of DNA.

See also

External links

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