Protein Stability
Buried hydrophobic side chains in a globular protein fit into a hole formed by the side chains of

9-12 other amino acids
13-15 other amino acids
5-7 other amino acids
1-3 other amino acids

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Protein Stability
Since ΔG° = -RTlnK

a 10-fold decrease in K increases ΔG° by about 10-fold
a 10-fold increase in K decreases ΔG° by about 10-fold
a 10-fold increase in K decreases ΔG° by about 2.3*RT
a 10-fold decrease in K decreases ΔG° by about 2.3*RT

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Protein Stability
Which of the following is the most correct?

Charged amino acids are seldom buried in the interior of a protein
Tyrosine is only found in the interior of proteins
All hydrophobic amino acids are buried when a protein folds
Charged amino acids are never buried in the interior of a protein

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Protein Stability
The correlation between free energy ΔG transfer between the aqueous/organic phases and the surface area of amino acid residues

ignores the important contribution of the peptide bond
is similar to effects seen with SDS denaturation
is only meaningful for the polar amino acids
reflects the reduction in solvent-accessible area during protein folding

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