By mechanosensors which sort of feel    Max Gains    that the muscle is being pulled into tension and pass that signal on now based on the latest research it isn't perfectly clear exactly which molecules are doing this sensing but the top candidates include customers which are collections of proteins that sit in the muscle fiber membrane and are responsible for holding muscle fibers together and transferring force between muscle fibers during contraction there's also titan which as a fun fact is actually the largest protein we've ever discovered in .



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