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Changes of
dolichol and dolichyl fatty acyl esters during the germination and development
of soybeans.
Biochem Cell Biol 1992 Jun;70(6):466-9
Ishinaga M, Yamauchi T, Egusa K, Kuroda K.
Department of Food and Nutrition, Hiroshima Women's University, Japan.
The amounts of dolichol and dolichyl fatty acyl esters and their composition in
various parts of soybean seedlings were determined during germination and
development. The dolichol content of cotyledons decreased during germination.
Dolichyl fatty acyl esters were identified in cotyledons and the amount was
estimated by high performance liquid chromatography. The relative amounts of
short-chain dolichols of 15, 16, and 17 isoprene units increased during
development of the seedlings. The homologue distribution of free dolichol was
different from that of dolichyl fatty acyl esters. The relative amounts of
dolichols with 16, 17, and 18 isoprene units were greater in free dolichol than
in dolichyl fatty acyl esters. The percentages of long-chain saturated fatty
acids in dolichyl fatty acyl esters, specifically 21:0, 22:0, 23:0, 24:0, and
25:0, increased during development. These fatty acids represented more than 40%
of the fatty acids in dolichyl fatty acyl esters in stems. These results suggest
that dolichyl fatty acyl esters are not a storage form of dolichol. The large
accumulation of dolichol and dolichyl fatty acyl esters in the leaves, where
photosynthesis takes place, suggests some other function.
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