The biofilm proteome of a dairy-associated Bacillus cereus strain (B. cereus 5) was investigated. Biofilm biomass of sufficient concentration for 2D-PAGE was obtained by growing the culture in the presence of glass wool. B. cereus 5 readily attached to the glass wool and biofilms formed within 18 h. The biofilm proteome of whole-cell proteins revealed that 10 proteins were synthesized as a result of surface attachment of which four were unique to the biofilm profile. Seven proteins appeared to be absent in the biofilm profile. The altered proteomes indicated that changes took place in the regulation of protein expression when B. cereus 5 cells attached to surfaces.
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Oosthuizen et al. (2001) studied this question.
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