The excitation spectrum and emission spectra (bold line) are shown for
Texas Red. The red-shaded region represents the bandpass filter commonly
used to measure TR fluorescence. On most flow cytometers, TR is excited
either by a Dye Laser (tuned to 595-605 nm) or a Krypton laser (567 nm).
Compare the TR fluorescence spectra to spectra for several FACS immunofluorescence dyes.