Term
| How many amino acids are commonly found in proteins? |
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Definition
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Term
| Amino acids are linked together by what type of bond? |
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Definition
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Term
| Each amino acid (except proline) has what three parts? Which part defines the protein? |
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Definition
Carboxyl group
Amino group
R-group - This defines the protein |
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Term
| Regarding amino acids, at physiological pH the ______ group is dissociated forming a ______ charge and the _____ group is protonated forming a ______ charge. |
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Definition
Carboxyl
negative
amino
positive |
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Term
| What are the 9 amino acids with nonpolar side chains? |
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Definition
Isoleucine
Leucine
Alanine
Glycine
Tryptophan
Methionine
Valine
Proline
Phenylalanine |
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Term
| What is so special about glycine, proline, and methionine? |
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Definition
Glycine has the smallest R-group (just one proton). It is good for tight conformations
Proline has a cyclical R-group. It is very disruptive to repetitive structures.
Methionine can disulfide bond. Important in cataract formation |
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Term
| Do the amino acids with nonpolar side chains promote hydrophobic or hydrophilic interactions? |
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Definition
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Term
| Are the electrons in an amino acid with nonpolar side chains evenly or disruptively distributed? |
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Definition
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Term
| Do nonpolar amino acids prefer to cluster in the interior of a protein? When located in a hydrophobic enviornment, where are the nonpolar amino acids located? |
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Definition
YES - They fill up the protein and provide the 3D shape
They are located on the protein surface |
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