title: Size-based chromatography of signaling clusters in a living cell membrane.
abstract: Here we introduce a form of chromatography that can be imposed on the membrane of a living cell. A cell-cell signaling interaction is reconstituted in a hybrid live cell-supported membrane junction. The chromatographic material consists of a hexagonally ordered array of gold nanoparticles (nanodot array), which is fabricated onto the underlying substrate. While individual membrane components move freely throughout the array, the movement of larger assemblies is impeded if they exceed the physical dimensions of the array. This tactile approach to probing membrane structures in living cells reveals organizational aspects of the membrane environment unobservable by other techniques.
authors.affiliation: Howard Hughes Medical Institute, Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Niña G
authors.initials: NG
authors.lastname: Caculitan
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kai
authors.forename: Eulanca Y
authors.initials: EY
authors.lastname: Liu
authors.forename: Nicole
authors.initials: N
authors.lastname: Fay
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.forename: Theobald
authors.initials: T
authors.lastname: Lohmüller
authors.forename: Geoff P
authors.initials: GP
authors.lastname: O'Donoghue
authors.forename: Jay T
authors.initials: JT
authors.lastname: Groves
mesh_terms: D002462:Cell Membrane / Q000737:chemistry* / Q000378:metabolism; D002845:Chromatography / Q000379:methods*; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D011948:Receptors, Antigen, T-Cell / Q000737:chemistry / Q000378:metabolism; D015398:Signal Transduction
chemical_list: D011948:Receptors, Antigen, T-Cell; D006046:Gold