Lipid bilayers containing the nicotinic acetylcholine receptor were investigated by attenuated total reflection (ATR) FTIR spectroscopy and by surface plasmon resonance (SPR). FTIR-ATR spectra reveal structural details of the transmembrane protein. Surface enhanced infrared absorption (SEIRA) provides access to structural details in the close vicinity of the surface of the ATR crystal. Information about the abundance of protein substructures as well as about the orientation of those substructures are obtained. SPR was applied in order to detect changes within the adsorbed biomembrane during admission of a neurotransmitter as acetylcholine. Switching of the ion channel was successfully observed by SPR. This result is a step forward towards highly selective biosensors and bioactuators.
|Number of pages
|Proceedings of SPIE - The International Society for Optical Engineering
|Published - 2000
|Biomedical Spectroscopy: Vibrational Spectroscopy and other Novel Techniques - San Jose, CA, USA
Duration: 26 Jan 2000 → 27 Jan 2000