| Mechanism | Retaining a | 
|---|---|
| Clan | GH-H | 
| 3D Structure Status | ( β / α ) 8 barrel | 
| Catalytic Nucleophile/Base | Asp (experimental) | 
| Catalytic Proton Donor | Glu (experimental) | 
| Note | New: many members have been assigned to subfamilies as described by Stam et al. (2006) Protein Eng Des Sel. 19, 555-562 (PMID: 17085431) | 
| External resources | CAZypedia; EBI Protein of the Month; PDB Molecule of the Month; | 
| Statistics | GenBank accession (6514); Uniprot accession (8); PDB accession (6); 3D entries (3); cryst (0) | 
| Activity Id | EC# | Activity Name | Residue -2 | Bond -1 | Residue -1 | Reacting Bond | Residue +1 | Bond +1 | Residue +2 | Reactant | 
| H1 | 3.2.1.1 | amylose endo-a-1,4-glucosidase | aDGlcp | 1,4 | aDGlcp | 1,4 | aDGlcp | 1,4 | aDGlcp | H2O | 
| H45 | 3.2.1.60 | amylose exo-a-1,4-glucotetraosidase | [(aDGlcp)3 | 1,4 | aDGlcp | 1,4 | aDGlcp | 1,4 | aDGlcp | H2O | 
| H75 | 3.2.1.98 | amylose exo-a-1,4-glucohexaosidase | [(aDGlcp)5 | 1,4 | aDGlcp | 1,4 | aDGlcp | 1,4 | aDGlcp | H2O | 
| H182 | 3.2.1.- | amylose exo-1,4-glucopentaosidase | [(aDGlcp)4 | 1,4 | aDGlcp | 1,4 | aDGlcp | 1,4 | aDGlcp | H2O | 
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