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a) In vitro PA images of the aqueous solution of LP-hCy7 in the presence of various representative metal ions (Ca2+, Mg2+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+, Cu2+ and MeHg+) at 690 (left) and 860 nm (right), respectively. b) Polt of the PA860/PA690 of LP-hCy7 against the concentration of MeHg+ ions. c) PA860/PA690 of the LP-hCy7 in the presence of various representative metal cations.
