mFluor™ dyes are developed for multicolor flow cytometry–focused applications. These dyes have large Stokes shifts and can be well excited by the laser lines of flow cytometers (e.g., 350 nm, 405 nm, 488 nm, and 633 nm). mFluor™ UV dyes are optimized to be excited with a UV laser at 350 nm.

mFluor™ UV440 SE is an amine-reactive fluorescent dye with excitation and emission maxima of ~350 nm and ~440 nm, respectively. Its NHS ester (SE) functional group enables efficient and stable labeling of primary amines on antibodies, peptides, and other biomolecules >10 kDa. With its narrow emission profile and strong signal in the violet-blue channel, mFluor™ UV440 SE is ideal for expanding flow cytometry panels without increasing spectral overlap. It is well suited for applications such as antibody conjugation, bead-based assays, and custom reagent development.