title: Long and short lipid molecules experience the same interleaflet drag in lipid bilayers.
abstract: Membrane interleaflet viscosity ηe affects tether formation, phase separation into domains, cell shape changes, and budding. Contrary to the expected contribution to interleaflet coupling from interdigitation, the slide of lipid patches in opposing monolayers conferred the same value ηe≈3×10(9)  J s m-4 for the friction experienced by the ends of both short and long chain fluorescent lipid analogues. Consistent with the weak dependence of the translational diffusion coefficient on lipid length, the in-layer viscosity was, albeit length dependent, much smaller than ηe.
authors.affiliation: Institut für Biophysik, Johannes Kepler Universität, Gruberstrasse 40, 4020 Linz, Austria.
authors.forename: Andreas
authors.initials: A
authors.lastname: Horner
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Akimov
authors.forename: Peter
authors.initials: P
authors.lastname: Pohl
mesh_terms: D004058:Diffusion; D005456:Fluorescent Dyes / Q000737:chemistry; D008051:Lipid Bilayers / Q000737:chemistry*; D008563:Membrane Lipids / Q000737:chemistry*; D013329:Structure-Activity Relationship
chemical_list: D005456:Fluorescent Dyes; D008051:Lipid Bilayers; D008563:Membrane Lipids