Patent ID: 7527957

Claim:
A method of altering the sensitivity of a family 11 parent xylanase polypeptide to an inhibitor, which method comprises modifying one or more amino acid residues of said polypeptide at any one of position 11, 12, 13, 15, 17, 29, 31, 32, 34, 113, 114, 119, 120, 121, 122, 123, 124 or 175 of the B. subtilis amino acid sequence shown as SEQ. ID. No. 1, or at equivalent position(s) in other homologous xylanases having at least 80% homology to SEQ ID NO: 1 as determined by using the GCG Wisconsin Bestfit package, and measuring the sensitivity of said xylanase to a xylanase inhibitor, wherein said xylanase inhibitor is a natural inhibitor found specifically in wheat extract; such that the polypeptide has altered sensitivity to said xylanase inhibitor as compared with the parent xylanase enzyme.