The present invention discloses novel polypeptides and enzyme preparations containing them, which improve the efficiency of cellulose and lignocellulose degradation even at elevated temperatures. The polypeptides can be pro- duced using conventional recombinant DNA technologies. The related polynucleotides, vectors and host cells are also disclosed. The polypeptides and the enzyme prepara- tions containing them are particularly useful in improving the efficiency of cellulose and lignocellulose degradation, in improving the quality of animal feed, in machine dish- washing applications, in detergent compositions, in pulp and paper, textile, food, baking or beverage industry.
