Letter | Published:

α-Amino-β-(pyrazolyl-N) Propionic Acid: a New Amino-Acid from Citrullus vulgaris (Water Melon)

Nature volume 184, pages B.A.69B.A.70 (05 September 1959) | Download Citation



DURING recent years, several new amino- and imino-acids have been characterized as components of the non-protein nitrogen fraction of plant materials. Another example has now been found in seeds of Citrullus vulgaris (water melon, var. Tom Watson). The structure of this new amino-acid (hereafter termed βPA) is as follows:

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  1. 1.

    , and , Nippon Nogei-Kagaku Kaishi, 31, 759 (1957) (taken from Chem. Abst., 52, 15612a (1958)).

  2. 2.

    , , , and , Proc. Chem. Soc., 131 (1959).

  3. 3.

    , and , Ber., 40, 3719 (1907).

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    • F. F. NOE

    Postdoctoral Fellow of the American Cancer Society.


  1. Department of Botany, University College, London, W.C.1 May 11.

    • F. F. NOE
    •  & L. FOWDEN


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