Unit Cell Measurements of Wet and Dry Crystalline Turnip Yellow Mosaic Virus

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Abstract

CBYSTALS of turnip yellow mosaic virus, kindly sent to us by Dr. Kenneth Smith and Dr. Roy Markham (see Nature, July 17, p. 88), were examined both optically and by X-ray diffraction in this Laboratory. The crystals were small, isotropic, less than 0·1 mm. in size and ill-formed, but just sufficiently developed to indicate that they were octahedral bipyramids. The smaller crystals, first observed by Smith and Markham under a 1/12 oil immersion lens1, are better formed and display a better development of this form. Following Federov‘s law on the relation between lattice development and crystal form, these crystals should possess a face-centred lattice.

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References

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    Markham, R., and Smith, K. M., Nature, 157, 300 (1946).

  2. 2

    Markham, R., Matthews, R. E. F., and Smith, K. M., Nature, 162, 88 (1948).

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    Bernal, J. D., and Fankuchen, I., J. Gen. Physiol., 25, 111 (1941).

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    Boyes-Watson, J., Davidson, E., and Perutz, M. F., Proc. Roy. Soc., A., 191, 83 (1947).

  5. 5

    Unpublished data.

  6. 6

    Cosslett, V. E., and Markham, R., Nature, 161, 250 (1948).

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BERNAL, J., CARLISLE, C. Unit Cell Measurements of Wet and Dry Crystalline Turnip Yellow Mosaic Virus. Nature 162, 139–140 (1948) doi:10.1038/162139a0

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