TY - JOUR
T1 - Ion-channel-like behavior in lipid bilayer membranes at the melting transition
AU - Gallaher, Jill
AU - Wodzinska, Katarzyna
AU - Heimburg, Thomas Rainer
AU - Bier, Martin
PY - 2010/6/30
Y1 - 2010/6/30
N2 - It is well known that at the gel-liquid phase-transition temperature a lipid bilayer membrane exhibits an increased ion permeability. We analyze the quantized currents in which the increased permeability presents itself. The open time histogram shows a " -3/2 " power law which implies an open-closed transition rate that decreases like k (t) t-1 as time evolves. We propose a "pore freezing" model to explain the observations. We discuss how this model also leads to the 1/ fα noise that is commonly observed in currents across biological and artificial membranes.
AB - It is well known that at the gel-liquid phase-transition temperature a lipid bilayer membrane exhibits an increased ion permeability. We analyze the quantized currents in which the increased permeability presents itself. The open time histogram shows a " -3/2 " power law which implies an open-closed transition rate that decreases like k (t) t-1 as time evolves. We propose a "pore freezing" model to explain the observations. We discuss how this model also leads to the 1/ fα noise that is commonly observed in currents across biological and artificial membranes.
U2 - 10.1103/PhysRevE.81.061925
DO - 10.1103/PhysRevE.81.061925
M3 - Journal article
C2 - 20866458
SN - 1539-3755
VL - 81
SP - 061925
JO - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
IS - 6, Part 1
ER -