TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preparation (Claimed): Preparation of the polypeptide comprises transforming a host cell with a vector encoding the polypeptide, and culturing the host cell under conditions enabling expression of the polypeptide, and optionally recovering and purifying the polypeptide produced. Preferred Components: The polypeptide comprises an amino acid sequence having at least 95% identity to the amino acid sequence of SEQ ID NO: 6 or amino acids 18-523 of SEQ ID NO: 6. The polypeptide is encoded by a polynucleotide comprising: the nucleotide sequence of SEQ ID NO: 5 (comprising a fully defined sequence of 3401 nucleobases as given in the specification); or a nucleotide sequence that is degenerate of the nucleotide sequence of SEQ ID NO: 5 as a result of its genetic code. The polypeptide is encoded by: the sequence comprised in SEQ ID NO: 5; or a plasmid carried by an Escherichia coli strain deposited under accession number DSM 16729. The enzyme preparation is in the form of spent culture medium, powder, granules or liquid. The enzyme preparation further comprises: at least one other enzyme activity which is a member comprising endoglucanase, beta -glucosidase, xylanase or other enzyme activities; and additives. The enzyme preparation comprises cellobiohydrolase, endoglucanase or beta -glucosidase, where the cellobiohydrolase comprises an amino acid sequence having at least 90% identity to the amino acid sequence of SEQ ID NO: 6 or amino acids 18-523 of SEQ ID NO: 6. The cellobiohydrolase is obtained from Acremonium thermophilum CBS 116240. The enzymes are recombinant enzymes produced in a strain from the genus Trichoderma or Aspergillus. The endoglucanase comprises an amino acid sequence having at least 90% identity to the amino acid sequence of SEQ ID NO: 10 (comprising a fully defined sequence of 335 amino acids as given in the specification), amino acids 31-335 of SEQ ID NO: 10, SEQ ID NO: 12 (comprising a fully defined sequence of 297 amino acids as given in the specification), amino acids 22-297 of SEQ ID NO: 12, SEQ ID NO: 14 (comprising a fully defined sequence of 251 amino acids as given in the specification), amino acids 21-251 of SEQ ID NO: 14, SEQ ID NO: 16 (comprising a fully defined sequence of 425 amino acids as given in the specification), or amino acids 18-425 of SEQ ID NO: 16. The endoglucanase is encoded by a gene obtainable from Thermoascus aurantiacus, Acremonium thermophilum or Chaetomium thermophilum. The beta -glucosidase comprises an amino acid sequence having at least 90% identity to the amino acid sequence of SEQ ID NO: 22 (comprising a fully defined sequence of 843 amino acids as given in the specification), amino acids 20-843 of SEQ ID NO: 22, SEQ ID NO: 24 (comprising a fully defined sequence of 861 amino acids as given in the specification), amino acids 19-861 of SEQ ID NO: 24, amino acids 20-861 of SEQ ID NO: 24, SEQ ID NO: 26 (comprising a fully defined sequence of 734 amino acids as given in the specification), or amino acids 21-734 of SEQ ID NO: 26. The beta -glucosidase is obtained from Thermoascus aurantiacus, Acremonium thermophilum or Chaetomium thermophilum. The enzyme preparation further comprises a xylanase, where the xylanase comprises an amino acid sequence having at least 90% identity to the amino acid sequence of SEQ ID NO: 18 (comprising a fully defined sequence of 329 amino acids as given in the specification), amino acids 27-329 of SEQ ID NO: 18, SEQ ID NO: 20 (comprising a fully defined sequence of 416 amino acids as given in the specification) or amino acids 20-416 of SEQ ID NO: 20. The xylanase is obtained from Thermoascus aurantiacus CBS 116239, or Acremonium thermophilum CBS 116240. In the enzyme preparation at least one of the enzyme is encoded by a plasmid carried by an Escherichia coli strain deposited under accession number DSM 16723, DSM 16728, DSM 16729, DSM 16727, DSM 17326, DSM 17324, DSM 17323, DSM 17729, DSM 16724, DSM 16726, DSM 16725, DSM 17325 or DSM 17667. The beta -glucosidase is obtained from Thermoascus aurantiacus CBS 116239, Acremonium thermophilum CBS 116240, or Chaetomium thermophilum CBS 730.95. The endoglucanase is encoded by a gene from Thermoascus aurantiacus CBS 116239, Acremonium thermophilum CBS 116240, or Chaetomium thermophilum CBS 730.95. EXAMPLE - No suitable example given.