The microbial degradation of cellulose and xylans requires several types of enzymes. Fungi and bacteria produce a spectrum of cellulolytic enzymes (cellulases) and xylanases which, on the basis of sequence similarities, can be classified into several families. One of these is known as the cellulase family A or as the glycosyl hydrolases family 5. This family comprises enzymes with several known activities: endoglucanase, beta-mannanase, exo-1,3-glucanase, endo-1,6-glucanase, xylanase, and endoglycoceramidase.
Cha o 3 is a minor allergen from Japanese cedar Chamaecyparis obtusa pollen.
Family-defining Pfam domains (at least one of these domains is present in each family member):
| Pfam domain | Pfam clan | ||
| PF00150 | Cellulase (glycosyl hydrolase family 5) | CL0058 | Tim barrel glycosyl hydrolase superfamily |
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