| AXE | Acetylxylan esterase |
| An | (GlcNAc)n |
| CDA | Chitin deacetylase |
| COS | Chitooligosaccharides |
| Dn | (GlcNH2)n |
| DA | Degree of acetylation |
| DP | Degree of polymerization |
| GlcNAc | N-acetylglucosamine |
| PA | Pattern of acetylation |
| paCOS | Partially acetylated chiton oligosaccharides |
| PDB | Protein data bank |