A variety of logic operations such as XNOR, NOR, AND, NAND, NOT have been designed with pH as an external modulator by choosing thiazole orange (TO) and a c-kit2 promoter quadruplex as two inputs and fluorescence signals of pyridyl bis-indole amide (PBIA) and TO as two outputs.
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School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264000, China.
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