Chemotaxis is the best-studied, prokaryotic signaling pathway, which typically consists of several key proteins that functionally link an environmental signal with motility (Wadhams and Armitage, 2004). Because the chemotaxis pathway utilizes a specialized version of a histidine kinase (CheA) and a response regulator (CheY), it is considered to be a distinct part of two-component signaling (Stock et al., 2000).

The various types of chemotaxis proteins (e.g. MCP, CheA, CheW, etc.) are displayed on the genome summary page. See the classification system for more information on how these proteins are identified and classified.