Which of the following best describes the function of endopeptidases?

Why does the presence of proline in a peptide sequence prevent cleavage at that site?

In a peptide sequencing lab, how would you choose between carboxypeptidase A and B?

In a methionine derivative, which position is directly bonded to the sulfur atom?

Which atom in methionine acts as a nucleophile in the SN2 reaction with cyanogen bromide?

Upon treatment with cyanogen bromide, a peptide chain containing multiple methionine residues is cleaved. What is the expected result?

Edman Degradation is a technique used for which of the following purposes?

Which step in the nucleophilic addition mechanism of Edman Degradation involves the attack by the nitrogen atom of phenyl isothiocyanate on the carbonyl carbon of the peptide bond?

Which step in the rearrangement of thioazolinone to thiohydantoin involves the conversion of the thioazolinone structure into a more stable form through the exchange of a hydrogen atom?

How do polystyrene beads contribute to the Merrifield solid-phase peptide synthesis?

What is the role of chloromethylated polystyrene in the Merrifield synthesis method?

What criteria should be considered when selecting an acyl protecting group for amino acids?