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Unusual tetraene sterols in some phytoplankton
Author(s) -
Patterson G. W.,
Gladu P. K.,
Wikfors G. H.,
Lusby W. R.
Publication year - 1992
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02535817
Subject(s) - sterol , double bond , ergosterol , phytoplankton , chemistry , botany , chlorophyta , strain (injury) , stereochemistry , food science , algae , biology , chromatography , biochemistry , organic chemistry , cholesterol , anatomy , nutrient
Sterols were analyzed from four phytoplankton strains which are under investigation as possible sources of food for oysters in culture. One strain of Pyramimonas contained only 24‐methylenecholesterol as a major sterol component. Pyramimonas grossii, Chlorella autotrophica and Dunaliella tertiolecta each contained a complex mixture of C 28 and C 29 sterols with Δ 7 , Δ 5,7 and Δ 5,7,9(11) nuclear double bond systems. Sterols were found both with and without the C‐22 side chain double bond. Ergosterol and 7‐dehydroporiferasterol were the principal sterols in each of the latter three species, which also contained the rare tetraene sterols, 24‐methylcholesta‐5,7,9(11),22‐tetraen‐3β‐ol and 24‐ethylcholesta‐5,7,9(11),22‐tetraen‐3β‐ol.