Fig. 2.

Schematic of the B. velezensis SQR9 McpA and TlpA chemoreceptor LBDs and the three derived receptor chimera. Shown are homology models of the LBD as generated by Phyre² (57). The blue and beige color segments represent the corresponding region of McpA and TlpA, respectively. The amino acid sequence fragment represents the fusion site between both modules. The segment in red is conserved in McpA and TlpA and was therefore used as the fusion point between both modules. TM: transmembrane region.