Letter | Published:

Examination of Optically Excited Amino-acids by Electron Spin Resonance at Very Low Temperature

Naturevolume 199page1092 (1963) | Download Citation



WE have recently1 investigated the irradiation by ultra-violet light of amino-acids at low temperature. Preliminary results of an investigation by electron spin resonance were given. We mentioned the difficulties of a correct interpretation of the signals obtained on micro-crystalline powders of phenylalanine and tryptophan. Here are the first results of an investigation concerning solutions of aromatic amino-acids (tryptophan, phenylalanine, tyrosine).

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  1. 1

    Douzou, P., and Ptak, M., Nature, 197, 1105 (1963).

  2. 2

    Douzou, P., and Ptak, M., C.R. Acad. Sci., Paris, 256, 516 (1963).

  3. 3

    Smaller, B., Nature, 195, 593 (1962).

  4. 4

    Smaller, B., J. Chem. Phys., 37, 1578 (1962).

  5. 5

    Sullivan, S. P. J., and Kooki, W. S., J. Amer. Chem. Soc., 84, 1 (1962).

  6. 6

    Gill, J. E., and Weissbluth, M. (private communication).

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  1. Muséum National d'Histoire Naturelle, Laboratoire de Biophysique, 61 rue Buffon, Paris



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