Refer to Table 4-4, Lehninger (Approximate Proportion of -Helix and ßConformatio

Question

Refer to Table 4-4, Lehninger (Approximate Proportion of -Helix and ßConformation in Some Single-Chain Proteins) Number 1. How many amino acid residues does carboxypeptidase have? 2a. What is the total % of ox-helix and ßsheet in carboxypeptidase? Number 2b. Why doesn't the % of -helix and ßsheet in carboxypeptidase add up to 100%? O There is no explanation for this in the Table Because some parts of the protein chain are in a different conformation, such as turns and bends, or unstructured. O 3. T/F: All functional proteins must have at least 12% ßsheet. O True O False

Explanation / Answer

1. Carboxypeptidase is an enzyme which break proteins into constituent amino acids, which is having a single chain of 307 amino acids.

2. carboxypeptidase A is 38%-alpha helices and 17% beta sheets

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