I've encountered the abbreviations such as "CheW" and "CheA" for certain organic molecules. For example:
Proteins associating with the Tar complex include the autophosphorylating protein kinase CheA, the transducing protein CheW, the methylating enzyme CheR and perhaps the protein phosphatase CheZ. (Morton-Firth et al. 1999, p. 1060; available here)
What does "Che" stand for? What do the capital letters at the ends of the abbreviations mean?
Let me know if this would be a better question for chemistry.SE.