Fig. 8From: Changes in the expression of genes encoding type IV pili-associated proteins are seen when Clostridium perfringens is grown in liquid or on surfacesβ-glucuronidase activity derived from pilin gene promoters. The values shown represent the mean and SEM of five independent samples of cells grown on PGY plates and processed as described in the Methods section. Asterisks indicate these vaules were significantly different (P < 0.001) from the pSM240 vector control using the two-tailed students t-test. The statistical difference between the measurements obtained from pSM402 and pSM401 (bar) were calculated using the two-tailed students t-testBack to article page