Power density spectra of a membrane containing ∼220 open CymA-channels taken at different temperatures between 4°C and 40°C. The membrane was formed from diphytanoyl phosphatidylcholine/n-decane. The aqueous phase contained 1 M KCl and 20 ng/ml CymA. The power density spectra of the control, i.e., of the membranes before the addition of CymA was subtracted from the Lorentzians. The power density spectra of the open CymA-channels could be explained by a Lorentzian function using the following parameters: τ = 1.66 ms, S0 = 1.2 × 10−24 A2s (T = 4°C); τ = 1.08 ms, S0 = 1.4 × 10−24 A2s (T = 20°C); and τ = 0.51 ms, S0 = 2.0 × 10−24 A2s (T = 40°C).