Enzymatic hydrolysis that converts lignocellulosic biomass to fermentable sugars may be the most complex step in this process due to substrate-related and enzyme-related effects and their interactions. This review looks at which organisms produce enzymes, as well as the chemistry and physics of these enzymatic processes.
Follow this link to learn more: http://www.cert.ucr.edu/research/ses/Enzymatic%20hydrolysis%20of%20cellulosic%20biomass.pdf