Abstract
THE formation of a red pigment from indole and pyridoxal interferes in the enzymatic determination of L-tryptophan1. On the basis of the following evidence, it is proposed that the pigment has the structure IIa shown in Fig. 1 and is therefore analogous to the rosein-doles of Fischer2.
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References
Scott, T. A., Biochem. J., 80, 462 (1961).
Fischer, E., and Wagner, P., Ber., 20, 815 (1887).
Sumpter, W. C., and Miller, F. M., Heterocyclic Compounds with Indole and Carbazole Systems, 203 (Interscience, 1954).
Harley Mason, J., and Bullock, J. D., Biochem. J., 51, 430 (1952).
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SCOTT, T. A Reaction of Pyridoxal with C-3 Unsubstituted Indoles. Nature 204, 77–79 (1964). https://doi.org/10.1038/204077a0
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DOI: https://doi.org/10.1038/204077a0
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