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24 Cards in this Set
- Front
- Back
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Aliphatic (R groups consist of carbon and hydrogens) |
Glycine, Alanine, Valine, Leucine, Isoleucine, Proline |
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Glycine |
R=H smallest a.a. with no chiral center |
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Alanine |
R=CH3 methyl group |
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Valine |
R=branched; hydrophobic; important in protein folding |
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Leucine |
R=4 carbon branched side chain |
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Isoleucine |
R=2 chiral center |
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Proline |
R=ring; puts bends or kinks in proteins; contains a secondary amino group |
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Aromatic (R groups have phenyl ring) |
Phenylalanine tyrosine tryptophan |
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Absorbs UV light at 280 nm ---> used to estimate [protein] |
Phenylalanine tyrosine tryptophan |
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Sulfur-containing R groups |
Methionine Cysteine |
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Methionine |
Sulfur is internal (hydrophobic) |
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Cysteine |
Sulfur is terminal; highly reactive; can form disulfide bonds
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Side chains with alcohols |
Serine Threonine |
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Serine |
Beta hydroxyl groups---> hydrophilic |
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Threonine |
Beta hydroxyl groups---->hydrophilic |
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Basic R groups |
Histidine Lysine Arginine |
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Histidine |
Hydrophilic side chains +ve charged at neutral pH |
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Lysine |
Hydrophilic side chains +ve charged at neutral pH |
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Arginine |
Strong base |
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Acidic R groups and amide derivatives (amide groups can form H bonds with atoms of other polar amino acids) |
Aspartate Glutamate Asparagine Glutamine |
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Aspartate |
Beta carboxyl group-confer- changes of proteins |
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Glutamate |
Gamma carboxyl group |
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Asparagine |
Amide of aspartate-side groups uncharged--->polar |
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Glutamine |
Amine of glutamate-side groups uncharged--->polar |
