Taken from Boisset, C., Fraschini, C., Schülein, M., Henrissat, B., and Chanzy, H., “Imaging the enzymatic digestion of bacterial cellulose ribbons reveals the endo character of the cellobiohydrolase Cel6A from Humicola insolens and its mode of synergy with celobiohydrolase Cel7A” Appl. Envr. Microbiol. 66: 1444-1452 (2000)