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Confocal microscopy images: In vitro binding studies of NKl-Lys-Rhodamine 5 conjugate to HEK293-NK1R cells, (a) Incubation of cells for 1 h at 37 °C with 25 nM of 5 (b) Image (a) under 3× magnification (c) Image (b) under white light (d) Incubation with 25 nM of 5 in presence of 100-fold excess of competing base ligand). Scale bar = 20 μm
