Bio-Rad 2-D Electrophoresis Workflow - Manual (Page 9)

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Wavelength, nm
Fig. 1. Fluorescence excitation and emission spectra of
Oriole stain. Oriole stain has its excitation maximum at 270 nm
and emission maximum at 604 nm, making it compatible with
UV-based imagers.
—, Excitation spectrum; ...., emission spectrum.