ID   1.14.19.75
DE   very-long-chain acyl-lipid omega-9 desaturase.
CA   (1) a 1-hexacosanoyl-2-acyl-phosphoglycerolipid + 2 Fe(II)-[cytochrome
CA   b5] + 2 H(+) + O2 = a 1-[(17Z)-hexacos-17-enoyl]-2-acyl-
CA   phosphoglycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O.
CA   (2) a 1-tetracosanoyl-2-acyl-phosphoglycerolipid + 2 Fe(II)-[cytochrome
CA   b5] + 2 H(+) + O2 = a 1-[(15Z)-tetracos-15-enoyl]-2-acyl-
CA   phosphoglycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O.
CC   -!- The enzyme, characterized from the plant Arabidopsis thaliana, acts
CC       on both 24:0 and 26:0 fatty acids, introducing a cis double bond at a
CC       position 9 carbons from the methyl end.
CC   -!- These very-long-chain fatty acids are found as a minor component of
CC       seed lipids, but also in the membrane phosphatidylethanolamine and
CC       phosphatidylserine, in sphingolipids, as precursors and components of
CC       cuticular and epicuticular waxes, and in suberin.
DR   Q9SID2, ADS2_ARATH ;
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