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Streptavidin, Texas Red® labeled, is a highly fluorescent conjugate of streptavidin and sulforhodamine 101. This red fluorescent product excites at about 595 nm and has an emission maximum at about 615 nm. Since the excitation and emission maxima are well separated from those of fluorescein, Texas Red® Streptavidin can be employed with Fluorescein Streptavidin or other fluorescein conjugates to simultaneously localize two antigens in the same tissue section. Texas Red® Streptavidin is also ideal for flow cytometry using instruments equipped with dye lasers. |