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Response of DA-ZP1-R9 to zinc pyrithione (ZnPT) in live HeLa cells. (a) DIC image. Signal from DA-ZP1-R9 (b) initially, (c) after addition 25 μM ZnPT, and (d) after addition of 50 μM TPEN. (e) Normalized fluorescence response in live cells. Scale bar = 25 μm
