Polyisoprenes in which the terminal member is saturated and oxidized to an alcohol, usually phosphorylated and often glycosylated; found in endoplasmic reticulum, but not in mitochondrial or plasma membranes; urinary levels are elevated in disorders exhibiting abnormal skin, rectal, or brain profiles in electron microscopy of biopsies.
- d. phosphate an intermediate in the glycosylation of proteins and lipids; contains 11–24 isoprene units; a product of the isoprenylation pathway; participates in the formation of glycosylphosphatidylinositol anchors of proteins in biomembranes.

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dol·i·chol (dolґĭ-kol) any of a group of polyisoprenoid lipids, containing 13–24 isoprene units and a terminal hydroxyl group, occurring in the endoplasmic reticulum. It is also the major lipid component of neuromelanin

Medical dictionary. 2011.

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