“…(2) is similar to that obtained by Tripsowa and Tuszyński (1997, Figure 2a), however, our potential is due to the symmetry change in the considered region (Pietruszka et al, , 2013. The tubulin protein dimer can undergo similar instability (Mitchison and Kirschner, 1984;Hameroff and Penrose, 2003, Figure 3 and 4, Wei and Lintilhac, 2007) as it was suggested in the case of pollen tube . Depending on parameters in Eqs (1) and (2), a symmetric or asymmetric potential can be obtained, like as in Tripsowa and Tuszyński (1997, Fig.…”