The present invention relates to a method for solubilising arabinoxylan-containing material (particularly insoluble arabinoxylan-containing material), comprising admixing a xylan- containing material with a xylanase comprising a polypeptide sequence shown herein as SEQ ID No. 3, SEQ ID No. 2, SEQ ID No. 1, SEQ ID No. 9, SEQ ID No. 10, SEQ ID No. 11 or SEQ ID No. 15, or a variant, homologue, fragment or derivative thereof having at least 75% identity with SEQ ID No. 3 or SEQ ID No. 2 or SEQ ID No. 1 or SEQ ID No. 9 or SEQ ID No. 10 or SEQ ID No. 11 or SEQ ID No. 15； or? a polypeptide sequence which comprises SEQ ID No. 3, SEQ ID No. 2, SEQ ID No. 1, SEQ ID No. 9, SEQ ID No. 10, SEQ ID No. 11 or SEQ ID No. 15 with a conservative substitution of at least one of the amino acids； or a xylanase which is encoded by a nucleotide sequence shown herein as SEQ ID No. 6, SEQ ID No. 5, SEQ ID No. 4, SEQ ID No. 12, SEQ ID No. 13, SEQ ID No. 14, SEQ ID No. 16, SEQ ID No.17 or SEQ ID No. 18, or a nucleotide sequence which can hybridize to SEQ ID No. 6, SEQ ID No. 5, SEQ ID No. 4, SEQ ID No. 12, SEQ ID No. 13, SEQ ID No. 14, SEQ ID No. 16, SEQ ID No.17 or SEQ ID No. 18 under high stringency conditions, or a nucleotide sequence which has at least 75% identity with SEQ ID No. 6, SEQ ID No. 5, SEQ ID No. 4, SEQ ID No. 12, SEQ ID No. 13, SEQ ID No. 14, SEQ ID No. 16, SEQ ID No.17 or SEQ ID No. 18, or a nucleotide sequence which differs from SEQ ID No. 6 or SEQ ID No. 5 or SEQ ID No. 4 or SEQ ID No. 12 or SEQ ID No. 13 or SEQ ID No. 14 or SEQ ID No. 16 or SEQ ID No.17 or SEQ ID No. 18 due to the degeneracy of the genetic code, or a xylanase obtainable (or obtained) from Fusarium verticilloides. The present invention also relates to a novel xylanase comprising (or consisting of) a polypeptide sequence shown herein as SEQ ID No. 3, SEQ ID No. 2 or SEQ ID No. 1, or a variant, homologue, fragment or derivative thereof having at least 99% identity with SEQ ID No. 3 or SEQ ID No. 2 or SEQ ID N
