Figure 1
From: Altered motility of Caulobacter Crescentus in viscous and viscoelastic media
Schematics of three strains of Caulobacter crescentus used: CB15 wild-type, CB15 Δpilin, and SB3860. The CB15 wild-type swarmer cell expresses pili (thin hairs) and the flagellar motor switches rotation directions to cause alternating forward and backward motion. The Δpilin cell expresses no pili, but the motor operates as the wild-type. The SB3860 (cheR138::Tn5 in YB375) is a double mutant, expressing no pili and moving exclusively forward.