Figure 5.
Combination of bacterial and fungal CDAs during N-acetylation. (A) Base peak chromatograms of HILIC-ESI-MS analysis showing products after N-acetylation of the chitosan tetramer (D4, [GlcN]4, open circles) by several bacterial and fungal CDAs in different orders (CnCDA4, PesCDA, VcCDA, NodB), resulting in four different but new single-, double-, and triple-deacetylated products. Figure B summarizes these different production routes.