Figure 1.

Domain architecture of chemoreceptors and chemotaxis proteins of Campylobacter jejuni 81–176 (in order of their location in the C. jejuni genome annotations) based on the Pfam (Pfam 27.0, March 2013; http://pfam.sanger.ac.uk/) and SMART (http://smart.embl-heidelberg.de/) analysis, with conserved domains represented in identically shaded regions. The transmembrane domains are abbreviated as Tm. Tar and Cache acronyms are derived from the proteins, prokaryotic aspartate receptor and animal Ca²⁺ channel subunits, respectively. The PAS domain was named after the period circadian protein-Per, the aryl hydrocarbon receptor nuclear translocator -Arnt and the single-minded protein –Sim. The HAMP domain is found in Histidine kinases, Adenylate cyclases, Methyl accepting proteins and Phosphatases. MCP stands for methyl-accepting chemotaxis receptor protein.