Changes in the expression of genes encoding type IV pili-associated proteins are seen when Clostridium perfringens is grown in liquid or on surfaces.

In particular, the pilB1 and pilT promoters exhibited 18- and 22- fold lower levels of β-glucuronidase activity, respectively, when comparing BHI and FABG plates, although the pilB1 promoter differences were not quite significant (Fig. 9 c).

also in 653 other papers