Tubulin dipole moment, dielectric constant and quantum behavior: computer simulations, experimental results and suggestions

Details Tubulin dipole moment, dielectric constant and quantum behavior: computer simulations, experimental results and suggestions Tubulin dipole moment, dielectric constant and quantum behavior: computer simulations, experimental results and suggestions

2004-02-10

arxiv.org/abs/physics/0402053v1

BioSystems, 77:73-85 (2004)

Physics

Biological Physics

A.M. is corresponding author: mershin@physics.tamu.edu 32 double-spaced pages, 4 figures. Keywords: tubulin, electric dipole m

Scientific paper

We used computer simulation to calculate the electric dipole moments of the alpha and beta tubulin monomers and dimer and found those to be |palpha|=552D, |pbeta|=1193D and |palpha-beta|=1740D respectively. Independent surface plasmon resonance (SPR) and refractometry measurements of the high-frequency dielectric constant and polarizability strongly corroborated our previous SPR-derived results giving delta-n/delta-c ~1.800x10^-3 ml/mg. The refractive index of tubulin was measured to be n_tub ~2.90 and the high frequency tubulin dielectric constant kappa_tub ~8.41 while the high-frequency polarizability was found to be alpha_tub ~ 2.1x10^-33 C m^2/V. Methods for the experimental determination of the low-frequency p are explored as well as ways to test the often conjectured quantum coherence and entanglement properties of tubulin. Biobits, bioqubits and other applications to bioelectronics are discussed.

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