Title of article
Fractionation of hydrogen isotopes during phytol biosynthesis
Author/Authors
Chikaraishi، نويسنده , , Yoshito and Tanaka، نويسنده , , Ryouichi and Tanaka، نويسنده , , Ayumi and Ohkouchi، نويسنده , , Naohiko، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
5
From page
569
To page
573
Abstract
Deuterium (D) depletion in phytol relative to ambient water as well as other lipids has been widely observed in various biological and geological samples; however, the mechanism for the depletion remains unknown. We have determined the hydrogen isotopic compositions of phytol and its precursors in cucumber cotyledons and have evaluated the fractionation of hydrogen isotopes during phytol biosynthesis. The hydrogen isotopic compositions of geranylgeraniol, dihydrogeranylgeraniol, tetrahydrogeranylgeraniol and phytol are −281‰, −302‰, −325‰ and −345‰, respectively. The results suggest that significantly D-depleted hydrogen is incorporated stepwise during hydrogenation of geranylgeraniol to phytol. We conclude that hydrogenation is important in controlling D depletion in phytol.
Journal title
Organic Geochemistry
Serial Year
2009
Journal title
Organic Geochemistry
Record number
2285180
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