Summary
It is generally admitted that the red pigment characteristic of the first phase of melanogenesis, “red body”, and Hallachrome are the same substance, viz. 2-carboxy-2,3-dihydroindole-5,6-quinone. However, these two substances possess such widely differing properties that it is almost impossible to regard them as identical. It seems difficult to decide on the basis of the existing evidence which of the two is really 2-carboxy-2,3-dihydroindole-5,6-quinone, if indeed either one of them be.
References
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Mazza etStolfi, etFriedheim ont extrait le pigment en plaçant les vers vivants dans l'alcool à 95° ou dans l'eau distillée. J'ai constaté que le pigment peut être obtenu avec un rendement très supérieur en plaçant les vers vivants directement dans l'alcool amylique acidifié par l'acide acétique.
F. P. Mazza etG. Stolfi, Arch. Sci. Biol.16, 185 (1931).
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S. H. Raper, Biochem. J.21, 89 (1927).
L. Califano etD. Kertész, Nature142, 1036 (1938); Enzymol.6, 233 (1938).
D. Kertész, Enzymol.12, 254 (1948);13, 182 (1949).
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Kertész, D. « Corps rouge » (Red Body) et Hallachrome. Experientia 6, 473–474 (1950). https://doi.org/10.1007/BF02154113
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DOI: https://doi.org/10.1007/BF02154113