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Extra Slides for Lecture 2 Twenty different amino acids are commonly found in proteins Asp Arg Lys Ile Met Polar covalent bond Nonpolar covalent bond Hydrophobic forces Polar amino acid side chains tend to be displayed on the outside of the folded protein where they can interact with water the nonpolar amino acid side chains are buried on the inside Polar amino acid side chains tend to be displayed on of the folded protein where they can interact with water the nonpolar amino acid side chains are buried on the inside The folding of polypeptide chain typically creates a cavity on the folded protein s surface where specific amino acid side chains are brought together
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