 The future bioeconomy will rely heavily on lignocellulosic biomass, which is difficult to process due to its recalcitrant nature. Enzymatic conversion of polysaccharides in this biomass, specifically cellulose, is a key technology in biorefineries and is currently being intensely researched. Recent developments have focused on new types of enzymes, such as CBM-33 and GH61, which promote the efficiency of classical hydrolytic enzymes by acting on the surfaces of insoluble substrates and introducing chain breaks in polysaccharide chains without extracting them from their crystalline matrix. This article was authored by Horne Sven, Vajrakolstad Gustov, Westerenbjaj, and others.