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Microscopy images of HeLa cells after 4 h treatment with (a) P(NIPAAm-co-DMAAm20%)-FL and (b) Tyr-P(NIPAAm-co-DMAAm20%)-FL at 34 °C and 40 °C. The fluorescent probes appear green and the nuclei were stained blue (DAPI). Magnification is 40×; the scale bar represents 20 μm.
