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a. Diagram of plates containing semi-solid media patterned with solutions of various ligands. Cells were plated at the location shown and grown for 10 h at 37 °C. b. Motility of wild-type cells expressing GFP. c. Motility of RP1616 (ΔcheZ) cells expressing a red fluorescent protein. d. Motility of reprogrammed cells expressing GFP.
