Representative time-lapse imaging of duodenum explants treated with QD-INS-conjugated Alexa Fluor 488 with CS/GS coating (QD-INS(488)–CS/GS). Treatment was received at t = 0 s, with images showing unstained tissue/cell outlines at 15 s. At 2–3 min, this tissue/cell area shows localized fluorescence. Scale bar, 20 µm.
