Fig. 2From: Clostridium acetobutylicum grows vegetatively in a biofilm rich in heteropolysaccharides and cytoplasmic proteinsElimination of sporulation and vegetative growth of C. acetobutylicum in the biofilm over time. The arrow indicates the clostridial-form cell (18 h), forespore (30 h) or free spore (42 h)Back to article page