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Fig. 4. Expression of Dab1RFP, but not the Dab1RFP-5F mutant, reduced the mobility of NBT-II cells plated on collagen. (A) The trajectory of Dab1RFP (red traces) was reduced as compared with GFP-expressing cells (green traces) that were imaged in the same experiment every 6 minutes over a period of 8 hours by time-lapse fluorescence microscopy. (B) The trajectory of Dab1RFP-5F (red traces) was comparable to GFP-expressing cells (green traces). (C) Co-expression of CrkIIGFP with Dab1RFP (purple) restored the ability to migrate on collagen to many of the co-expressing cells, and in the same experiment cells expressing Dab1RFP alone (red) showed little movement (Bar, 60 µm). The cell tracings are a composite of three independent experiments in which similar results were obtained.





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