the growth conditions -- specifically , growth either on cellulose ( avicel ) or on cellobiose as insoluble or soluble carbon sources , respectively -- were found to be critical to the distribution of the cellulosome in the mutant system : the cellobiose-grown mutant ( in contrast to the wild type ) lacked the cellulosome on its surface and produced only minor quantities of the extracellular cellulosome accompanied by other relatively low-molecular-weight cellulases .
C0007648
cellulose
C0007630
cellobiose