Abstract
A microfluidic device was designed allowing the formation of a planar lipid bilayer across a micron-sized aperture in a glass slide sandwiched between two polydimethylsiloxane channel systems. By flushing giant unilamellar vesicles through a 500-μm-wide channel above the hole, we were able to form a planar lipid bilayer across the hole, resulting in a giga-seal. We demonstrate incorporation of biological nanopores into the bilayer. This miniaturized system offers noise recordings comparable to open headstage noise (under 1 pA RMS at 10 kHz), fast precision perfusion on each side of the membrane and the use of nanoliter analyte volumes. This technique shows a promising potential for automation and parallelization of electrophysiological setups.
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Acknowledgements
Financial support through EU grant MRTN-CT-2005–019335 (Translocation) is acknowledged. C.F. is a fellow of the International Center for Transdisciplinary Studies (ICTS) at Jacobs University Bremen gGmbH.
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Mach, T., Chimerel, C., Fritz, J. et al. Miniaturized planar lipid bilayer: increased stability, low electric noise and fast fluid perfusion. Anal Bioanal Chem 390, 841–846 (2008). https://doi.org/10.1007/s00216-007-1647-7
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DOI: https://doi.org/10.1007/s00216-007-1647-7