Question
Describe how ATP is utilized during actin treadmilling.
Answer :
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Actin treadmilling is a dynamic process in which actin filaments continuously grow at their barbed (plus) end and shrink at their pointed (minus) end, maintaining a steady-state filament length while allowing rapid cytoskeletal remodeling. ATP plays a central role in this process, primarily by regulating actin filament assembly and disassembly. Actin monomers exist in the cytoplasm as ATP-actin or ADP-actin. ATP-actin has a higher affinity for filament polymerization, and these monomers preferentially add to the barbed end of an existing filament.
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