More amino acids

Card Set Information

Author:
DesLee26
ID:
283398
Filename:
More amino acids
Updated:
2014-09-17 22:28:30
Tags:
Sam
Folders:
BIC
Description:
Test One
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  1. Located in active sites of enzymes, where the imidazole ring can bind and release protons in the course of enzymatic reactions

    histidine
  2. Can be positive or deprotonated and neutral
    histidine
  3. Aliphatic: long, branched, or straight side chains
    Hydrophobic side chains
  4. Smallest; fits in tight places
    Glycine
  5. First sulfur containing amino acid (doesn’t react with anything)
    à first amino acid when protein is synthesized
    Methionine
  6. Largest side chain incorporated into protein
    Good for filling large places/ introduced into wrong places leads to negative interactiosn
    Tryptophan
  7. All hydrocarbon ring structure
    Phenylalanine
  8. Its side chain loops around and binds to –NH2—of backbone
    Very rigid to side chain
    When incorporated, it forms kinks in the amino acid backbone
    Proline
  9. Ionic bonds outside
    - if inside, it is doing something important like a reaction mechanism
    Lysine and arginine
  10. pKa of: 
    terminal carboxyl group
    3.1
  11. pKa of: 
    glutamate and aspartate
    4.1
  12. pKa of: 
    histidine
    6
  13. pKa of: 
    terminal alpha amino group
    8.0
  14. pKa of: 
    cysteine
    8.3
  15. pKa of: 
    tyrosine
    10.9
  16. pKa of: 
    lysine
    10.8
  17. pKa of: 
    arginine
    12.5

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