Cellulomonas flavigena, a Gram-positive and cellulolytic bacterium, is known to produce a curdlan-type exopolysaccharide (i.e., linear β-1,3-glucan). However, curdlan-producing colonies of this organism do not stain on aniline blue agar, a defining characteristic of other curdlan-producing bacteria. In this study, Cellulomonas curdlan, extracted with the inert solvent DMSO, caused a redshift in the absorption spectrum of aniline blue, matching results reported for Agrobacterium curdlan and confirming earlier biochemical analyses. Cellulomonas curdlan has many biotechnological applications.
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