Proteins

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  • Proteins
    • Monomers: Amino Acids.
      • 20 different amino acids. 8-10 are essential (must be obtained through diet) others can be synthesized in body.
      • Plants use nitrates from soil to obtain amino group. Organic groups made in photosynthesis.
      • Animals take in proteins in diet. Digested into amino acids which are built up into new proteins.
      • Excess amino acids cannot be stored. Amino group makes them toxic. Deamination is process by which amino group is removed in liver. Converted into urea and removed in urine.
    • A group of organic compounds whose molecules consist of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur.
    • Structure:
    • Testing for Proteins: equal parts biuret reagent to protein. Lilac for positive test.

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