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Published on Apr 16, 2012
Every second about a billion water molecules (red and white spheres) pass through a channel formed in the middle of an aquaporin protein as shown by white (nonpolar) and green (polar) areas, and charged areas in blue (positive) and red (negative). The yellow sphere highlights the path of a single water molecule.
Related paper: Emad Tajkhorshid, Peter Nollert, Morten Ø. Jensen, Larry J. W. Miercke, Joseph O'Connell, Robert M. Stroud, and Klaus Schulten. Control of the selectivity of the aquaporin water channel family by global orientational tuning. Science, 296:525-530, 2002. http://www.ks.uiuc.edu/Publications/P...
Note: this movie was originally posted in October 2007, but was re-uploaded in April 2012 to improve video quality. The original version is here: http://youtu.be/XxadMJ9zqpA