Chemotaxis of Burkholderia sp. strain SJ98 towards different CNACs monitored with ( A ) drop plate assays; and ( B ) swarm plate assays. Cells of strain SJ98 were grown in the presence of the respective CNAC and then tested for chemotaxis. Both the assays were preformed in triplicate and the representative plates are shown here. Aspartate was used as the positive control. Positive chemotaxis was determined by monitoring the formation of bacterial cell accumulation in the form of concentric chemotactic rings.