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1. Explain why polyaspartatic acid (a peptide containing only aspartic acid residues) does NOT form an...

1. Explain why polyaspartatic acid (a peptide containing only aspartic acid residues) does NOT form an alpha helix at pH 7.0 but can at pH 2. 6.

2. What kind of non-covalent interaction would the following pairs of amino acids have in the three dimensional structure of a protein at pH 7.0?

a) His-Asp

b) Tyr-Asp

c) Val-Leu

d) Trp-Gln

3. Explain how the difference in structure of hemoglobin and myoglobin contribute to their different functions.

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