Abstract: We treat protofilaments in the wall of microtubule (MT) as a onedimensional dynamic system based on symmetry of the cytoskeletal MT structure. Using a double-potential-well model and quantum mechanics, we calculate the electron penetration probability through potential barrier and ground state level splitting induced by the electron tunneling effect, which occurs in a protofilament in the MT wall. Some interesting results are obtained. 

Key words: double potential wells, protofilament, tunneling effect, cytoskeletal microtubule