claim: Salt River Valley is in Arizona.
evidence: In molecular biology , the ZapA protein family is a group of related proteins that includes the cell division protein ZapA .. protein. protein. cell division. cell cycle. proteins. proteins. The structure of ZapA has a core structure consisting of two layers alpha / beta , and has a long C-terminal helix that forms dimeric parallel and tetrameric antiparallel coiled coils .. structure. secondary structure. helix. helix. dimeric. protein dimer. tetrameric. tetrameric protein. antiparallel. Antiparallel ( biochemistry ). ZapA interacts with FtsZ , where FtsZ is part of a mid-cell cytokinetic structure termed the Z-ring that recruits a hierarchy of fission related proteins early in the bacterial cell cycle .. structure. secondary structure. FtsZ. FtsZ. proteins. proteins. cell cycle. cell cycle. ZapA drives the polymerisation and filament bundling of FtsZ , thereby contributing to the spatio-temporal tuning of the Z-ring .. FtsZ. FtsZ. filament. Protein filament