Glycoproteins and Glycolipids

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  • Membrane Component
    • Glycolipids
      • Acts as a cell marker called an antigen
      • Carbohydrate chain points out of cell
      • Used by immune system to recognise cells as self or non-self
      • Phospholipid with a carbohydrate chain attached to the phosphate head
      • Identifies cells
      • Only found in cell surface membrane
    • Glycoprotein
      • cell adhesion - holds cells of a tissue together
      • Carbohydrate chain points out of the cell
      • Carbohydrate chain binds to water - stabilises the structure of the cell surface membrane
      • cell signalling - glycoprotein is a receptor for a chemical messenger
      • Only found in cell surface membrane
      • Binding site for transport proteins
      • Intrinsic protein with a carbohydrate chain attached
    • glyco = carbohydrate

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