Noisy kink in microtubules

We study the power spectrum of a class of noise effects generated by means of a digital-like disorder in the traveling variable of the conjectured Ginzburg-Landau-Montroll kink excitations moving along the walls of the microtubules. We have found a 1/f^{\alpha} noise with \alpha \in (1.82-2.04) on all the time scales we have considered