Patent ID: 7572604

Claim:
A modified polypeptide having β-glycosidase activity, said polypeptide comprising an amino acid sequence selected from: (a) the amino acid sequence of SEQ ID NO:2 mutated at an amino acid residue or residues selected from the group consisting of W433, E432 and M439 and combinations thereof; (b) the amino acid sequence of a family 1 glycosyl hydrolase mutated at an amino acid residue or residues corresponding to an amino acid residue or residues selected from the group consisting of W433, E432 and M439 of SEQ ID NO:2 and combinations thereof; and (c) a variant of (a) having β-glycosidase activity and mutated at an amino acid residue or residues corresponding to an amino acid residue or residues selected from the group consisting of W433, E432 and M439 of SEQ ID NO:2 and combinations thereof, wherein said variant has at least 95% identity to SEQ ID NO:2 over the entire length of the sequence.