Physics – Quantum Physics
Scientific paper
2003-02-20
J. Modern Optics No. 15-17, p2381-2391 (2003)
Physics
Quantum Physics
Submitted to Journal of Modern Optics *Corresponding author: Andreas Mershin (mershin@physics.tamu.edu)
Scientific paper
Biosensors based on the principle of surface plasmon resonance (SPR) detection were used to measure biomolecular interactions in sarcomeres and changes of the dielectric constant of tubulin samples with varying concentration. At SPR, photons of laser light efficiently excite surface plasmons propagating along a metal (gold) film. This resonance manifests itself as a sharp minimum in the reflection of the incident laser light and occurs at a characteristic angle. The dependence of the SPR angle on the dielectric permittivity of the sample medium adjacent to the gold film allows the monitoring of molecular interactions at the surface. We present results of measurements of cross-bridge attachment/detachment within intact mouse heart muscle sarcomeres and measurements on bovine tubulin molecules pertinent to cytoskeletal signal transduction models.
Kolomenskii Alexander A.
Mershin Andreas
Nanopoulos Dimitri V.
Schuessler Hans A.
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