FIG 7 .

Growth in the presence of chicken mucus promotes motility and increased negative DNA supercoiling, and this effect is more pronounced with colonic mucus than with mucus from the cecum. (A) Growth in the presence of 100 µg/ml of chicken cecal mucus subtly increases negative DNA supercoiling levels, but colonic chicken mucus significantly increases negative supercoiling levels. (B) Growth in the presence of 100 µg/ml of chicken colonic or cecal mucus leads to increased expression of FlgR and decreased expression of FlgS, which is more pronounced with colonic than with cecal mucus.