Chitinase activity of CpChiA. Exo-chitinase activity of CpChiAC (A, B) and CpChiAC-CBM5 (C, D) is demonstrated via HPAEC-PAD analysis of hydrolytic products generated during incubation with β-chitin (A, C). GlcNAc and Chi2 are the major products from this substrate, and the product profile does not change over time, indicating an exo mode of hydrolysis. The same final products are released from the pentasaccharide substrate Chi5 (B, D). (E) Kinetic analysis of CpChiAC and CpChiAC-CBM5 against the 4MU-Chi3 fluorescent substrate.