The Rho family of small GTPase proteins comprises CDC42 (Cell Division Cycle-42), Rac, and Rho. Proteins of the Rho/Rac subfamily (Rho proteins) of small GTP-binding proteins function as molecular switches that regulate a multitude of biological processes including cell proliferation, apoptosis, differentiation, migration, cytoskeletal reorganization, and membrane trafficking. Like most of the Ras-related proteins, Rho GTPases cycle between an inactive GDP-bound conformation and an active GTP- bound conformation. Cycling betw...
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