Abstract
I HAVE reported the presence of echinochrome A (7-ethyl-2,3,5,6,8-pentahydroxy-1,4-naphthaquinone) in the spines of the sea urchin, Echinarachnius (Scaphechinus) mirabilis1 and Diadema setosum2. Recently it was found that the principal naphthaquinone pigment in the almost black spines of the sea urchin, Stomopneustes variolaris (Lamarck) (Japanese name, kuro-uni), which was collected at Shirahama in Wakayama Prefecture, was identical with echinochrome A. The isolation and purification of the pigment have been carried out by the identical method used in the case of Diadema setosum.
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References
Nishibori, K., Bull. Jap. Soc. Fish., 22, 708 (1957).
Nishibori, K., Nature, 184, 1234 (1959).
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NISHIBORI, K. Isolation of Echinochrome A from the Spines of the Sea Urchin, Stomopneustes variolaris (Lamarck). Nature 192, 1293–1294 (1961). https://doi.org/10.1038/1921293a0
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DOI: https://doi.org/10.1038/1921293a0
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