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Science 18 October 1968:
Vol. 162. no. 3851, p. 363
DOI: 10.1126/science.162.3851.363
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Articles

Sterols: Isolation from a Blue-Green Alga

Noel J. de Souza 1 and William R. Nes 1

1 Department of Biological Sciences, Drexel Institute of Technology, Philadelphia, Pennsylvania 19104

A crystalline mixture of sterols was isolated from the filamentous blue-green alga Phormidium luridum. The mixture consisted of unsaturated 24-ethylcholesterols possessing Dgr7-, Dgr5,7-, and Dgr5-bonds together with their Dgr22-derivatives and a small amount of cholesterol. The major component was 24-ethyl-Dgr7-cholestenol. Squalene and phytol were also evident.


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