Zinquin ethyl ester

Zinquin ethyl ester is a fluorescent derivative of Zinquin and is a fluorescent probe of cytosolic zinc. Zinquin ethyl ester is able to penetrate cell membranes and is lipophilic and zinc-sensitive. Zinquin ethyl ester can combine with Zn2+ in the presence of Ca2+ and Mg2+ to produce blue fluorescence[1].