NAPHTHAQUINONE PIGMENT IN THE TROPICAL SEA URCHIN DIADEMA ANTILLARUM PHILIPPI
Open Access
- 30 October 1957
- journal article
- Published by Wiley in Journal of Zoology
- Vol. 129 (2) , 263-272
- https://doi.org/10.1111/j.1096-3642.1957.tb00289.x
Abstract
Summary.: Pigment with the characteristics of a naphthaquinone is widely distributed throughout the body of the echinoid Diadema antillarum. Chromatography indicates that there is a main reddish orange pigment sometimes accompanied by small amounts of a purple pigment.The purified main pigment crystallises in red needles which melt at 223°C, sublime about 200°C, and in acidified ether show absorption maxima at 263/64: 337/39: 462/63 mμ. It appears to be a hydroxynaphthaquinone resembling echinochrome A.Keywords
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