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Normalized cumulative distribution function of TRITC-DHPE in a polymer-tethered SOPC bilayer of different molar concentrations of tethered lipids ctether: 0 mol % (unobstructed diffusion), 10 mol %, 15 mol %, 20 mol %, and 30 mol %. Also included are fitting curves using the single exponential function of Eq. 3 (dashed line) and the incomplete gamma function of Eq. 4 (solid line). The data indicate normal diffusion for ctether ≤ 10 mol % and anomalous diffusion at ctether ≥ 20 mol %.
