Hoechst 33342 trihydrochloride

Hoechst 33342 trihydrochloride is a membrane permeant blue fluorescent DNA stain. Hoechst binds to the grooves in the DNA double strand, which tends to be A/T-rich DNA strand. Although it binds to all nucleic acids, the A/T-rich double strand DNA significantly enhances fluorescence intensity Therefore, Hoechst dye can be used for living cell labeling. The fluorescence intensity of Hoechst dye increases with the increase of pH of solution.