Letter | Published:

Niacinogen-hydrolysing Enzyme in Extracts from Rice Seedlings

Naturevolume 198pages484485 (1963) | Download Citation



THE alkali-labile bound form of nicotinic acid (niacinogen) has been isolated as a coloured crystalline compound from different cereals1,2. It is composed of nicotinic acid, a chromophoric moiety or moieties and a peptide, the nicotinic acid being linked through an alkali-labile ester linkage. The occurrence of the niacinogen in cereals suggests a common biological role of this compound in cereal grains. It has been found that in cereals, niacinogen is synthesized in the ripening stage and there is an increase in the nicotinic acid and pyridine nucleotide contents along with a decrease in the niacinogen content during germination3.

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  1. 1

    Guha, B. C., and Das, M. L., Nature, 180, 1285 (1957).

  2. 2

    Das, M. L., and Guha, B. C., J. Biol. Chem., 235, 2971 (1960).

  3. 3

    Ghosh, H. P., thesis, Univ. Calcutta (1962).

  4. 4

    Das, M. L., and Ghosh, N. C., Ind. J. Med. Res., 45, 631 (1957).

  5. 5

    Kodicek, E., and Reddi, K. K., Nature, 168, 475 (1951).

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  1. Department of Applied Chemistry, University of Calcutta, Calcutta, 9

    • H. P. GHOSH
    • , P. K. SARKAR
    •  & B. C. GUHA


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