Figure 3. Mean open channel lifetimes of currents from multiple channel currents and single channel currents. The currents were recorded from Xenopus oocytes at -120 mV in divalent free perfusion solutions and were sampled at 20 kHz and filtered at 5 kHz. (A) Single channel current (left) shown with the idealized current above and the histogram below. The mean amplitude and open channel noise are 4.1 pA and 2.4 pA. (B) Currents from a patch containing two channels (left) with the idealized currents shown above and the histograms below. The mean amplitude and open channel noise are 4.8 pA and 1.5 pA. (C) Mean open lifetimes of currents from patches containing one (n = 6), and two (n = 4) and three (n = 5) opening levels. (D) The relative open channel noise of single channel currents and of the 1st and 2nd opening levels of multiple channel currents. The amplitude difference between 1st and 2nd level of multiple channel currents is insignificant. However, the noise of multiple channels (either 1st or 2nd level) and single channel currents is significantly different (p > 0.05, t-test).
Image published in: Ding S and Sachs F (2002)
Image downloaded from an Open Access article in PubMed Central. Copyright © 2002 Ding and Sachs; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.
Permanent Image Page
Printer Friendly View
XB-IMG-116308