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A) Conceptual schematic of the fluid membrane-based soluble-ligand display strategy. B) The fluid membrane-tethered EGF-based cell assay and fluorescence recovery after photobleaching (FRAP) experiments to test the fluidity of both EGF molecules and lipids on a glass cover slide. See Experimental Section for details. *Attofluor cell chamber was used throughout the addition of EGF to the SLB, FRAP experiments, the addition and incubation of cells on the SLB, and imaging processes.
