AbFluor™ dyes are a series of highly water-soluble fluorescent dyes spanning the visible and near-infrared spectrum for Labeling biomolecules, especially proteins and nucleic acids. AbFluor™ dyes bear the core structures of different fluorescent dye core structures that cover the fluorescence spectrum from UV to NIR. Innovative modifications to the core structure makes AbFluor™ dyes superior to other commercial dyes with many innovative novel features. AbFluor™ 350 is a bright UV-excitable blue ?uorescent dye with the ?Ex/?Em of 347/448nm, highly water-soluble and pH insensitive, which is super alternative to AMCA, Alexa Fluor 350. It yields brightest blue ?uorescent conjugates for 350 nm excitation.