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Uploaded on Aug 3, 2008
A starved cell population of ~10000 Dictyostelium cells develops on agar in a 1mm wide hole to form a slime mold (and eventually a fruiting body, not shown). Fluorescence microscopy is used to visualize a ubiquitously expressed RFP-fusion protein. The movie shows how cells aggregate via chemotaxis. (For more information go to http://tglab.princeton.edu)