 The future bioeconomy will rely heavily on lignocellulosic biomass, which is difficult to process due to its recalcitrant nature. Enzymatic conversion of cellulose, the most abundant and homogeneous polysaccharide in lignocellulosic biomass, is a key technology for future bio-refineries. Recent research has focused on new enzyme types such as CBM-33 and GH61 that 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 Gustav, Westerung Jage and others.