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A-Level Biology OCR A

Strong Inflexible Insoluble Describe Structure Properties Location Function

Front Describe structure, properties, location and function of keratin.
Back Keratin:

Structure:
  • Group of fibrous proteins
  • High proportion of sulfur containing cysteine that form strong disulfide bonds making it strong, inflexible and insoluble

Properties:
  • Strong
  • Inflexible
  • Insoluble

Location:
  • Hair
  • Skin
  • Nails

Function:
  • Protective barrier
  • Formation of hair, skin, nail tissue

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