Cellulose is well kown as structural polysaccharide of the plant cell wall, consisting of linear glucan chains linked by β-1,4-glycosidic bonds at different polymerization degree. It can also be secreted from bacteria for biofilm formation.
References
Crawford, R. L. (1981). Lignin biodegradation and transformation. New York: John Wiley and Sons. ISBN 978-0-471-05743-7. Updegraff D. M. (1969). "Semimicro determination of cellulose in biological materials". Analytical Biochemistry. 32 (3): 420–424. doi:10.1016/S0003-2697(69)80009-6 Romeo, T. (2008). Bacterial biofilms (pp. 258–263). Berlin: Springer.