| Mechanism | Retaining e | 
|---|---|
| Clan | GH-A | 
| 3D Structure Status | ( β / α ) 8 barrel | 
| Catalytic Nucleophile/Base | Glu (experimental) | 
| Catalytic Proton Donor | Glu (experimental) | 
| Note | Once known as cellulase family A; many members have been assigned to subfamilies as described by Aspeborg et al. (2012) BMC Evol Biol. 12(1):186 (PMID: 22992189). | 
| External resources | CAZypedia; PROSITE; | 
| Statistics | GenBank accession (355); Uniprot accession (2); | 
| Activity Id | EC# | Activity Name | Residue -2 | Bond -1 | Residue -1 | Reacting Bond | Residue +1 | Bond +1 | Residue +2 | Reactant | 
| H19 | 3.2.1.25 | b-mannosidase | [bDManp | 1,X | alcohol | H2O | ||||
| H354 | 3.2.1.- | mannan exo-b-1,4-mannosidase | [bDManp | 1,4 | bDManp | 1,4 | bDManp | H2O | ||
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