NAPHTHAQUINONE PIGMENT IN THE TROPICAL SEA URCHIN DIADEMA ANTILLARUM PHILIPPI
Article first published online: 20 AUG 2009
1957 The Zoological Society of London
Proceedings of the Zoological Society of London
Volume 129, Issue 2, pages 263–272, October 1957
How to Cite
MILLOTT, N. (1957), NAPHTHAQUINONE PIGMENT IN THE TROPICAL SEA URCHIN DIADEMA ANTILLARUM PHILIPPI. Proceedings of the Zoological Society of London, 129: 263–272. doi: 10.1111/j.1096-3642.1957.tb00289.x
- Issue published online: 30 OCT 2009
- Article first published online: 20 AUG 2009
- Accepted 12th March 1957
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.