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Unformatted text preview: process we studied in this problem. This guarantees that the equilibration cannot interfere with the information ﬂow. 2. Problem #2 Solution . (a) The rate of ions passing through a single channel is n = D Δ C L A = (1 μm 2 /ms ) 100 mM 5 nm 1 nm 2 = 1 . 2 × 10 7 s-1 . (8) (b) The number of ions is the current divided by unit charge n = I/e = 4 . 5 pA/e = 2 . 8 × 10 7 s-1 . (9) This is consistent with the result of part a. (c) The channel is open approximately 4 out of 27 seconds. For a channel that is 50% of the time open the “square wave” pattern should be symmetrical with equal times open and closed within one period. 2...
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This note was uploaded on 09/21/2008 for the course BIPH 11 taught by Professor Kondev during the Spring '07 term at Brandeis.
- Spring '07