How do carboxypeptidase A and B differ in their role in peptide sequencing?

Carboxypeptidase A is more effective at high pH while B is more effective at low pH.

Carboxypeptidase A targets basic amino acids while B targets aromatic amino acids.

Carboxypeptidase A targets aromatic amino acids while B targets basic amino acids.

Both target acidic amino acids but have different preferences for chain length.