102 handout 920 - MCB102 Handout 9/20 1 Draw the...

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MCB102 Handout 9/20 1. Draw the approximate positions of these four proteins on a 2D gel. Myoglobin: molecular weight = 16,700 Da pI = 7.0 Lysozyme: molecular weight = 14,400 Da pI = 11.0 Pepsin: molecular weight = 34,000 Da pI < 1.0 Urease: molecular weight = 480,000 Da pI = 5.0 2. List the major enthalpic and entropic contributions (positive and negative) to the overall free energy change as a protein folds. Consider both the protein and the aqueous environment. Positive Negative . Enthalpy Entropy 3. Compare the benefits and drawbacks of X ray crystallography and NMR for determining structure. 4. Name 3 factors that affect the binding of oxygen to hemoglobin.
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MCB102 Handout 9/20 5. The following are fictional molecular weights of 5 amino acids:
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