Term
| Polar-charged amino acids |
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Definition
Aspartic acid
Glutamic acid
Lysine
Arginine
Contain relatively strong organic acids and bases. Able to form ionic bonds with other charged species in the cell. |
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Term
| Polar-uncharged amino acids |
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Definition
Serine
Threonine
Glutamine
Asparagine
Tyrosine
Partially negative or positive charge. Able to form hydrogen bonds with molecules, including water |
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Alanine
Valine
Leucine
Methionine
Phenylalanine
Tryptophan
Hydrophobic |
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Term
| Unique-property amino acids |
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Definition
Glycine: a single hydrogen
Cysteine: even though it is polar-uncharged in character, it is able to form a covalent bond with another cysteine to form a disulfide link
Proline: even though it has a hydrophobic character, it is able to create kinks in polypeptide chains and disrupt ordered secondary structure |
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His, H
polar
neutral (90%), basic (10%) (+) |
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