How Are Serine Proteases Regulated to Cleave Some Peptide Bonds

question 8

Multiple Choice

How are serine proteases regulated to cleave some peptide bonds more frequently than others?

• A) Substrate conformation changes to hide certain cleavage sites on binding to enzyme
• B) Small molecules block some sites
• C) The enzyme dimerizes around the substrate
• D) There is a b-pleated sheet interaction between enzyme and substrate
• E) Zymogen can be activated only at certain sites

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