Why you use two dyes in loading dye?

Two dyes are used in loading dye to help track the progress of DNA or RNA during gel electrophoresis. Typically, one dye migrates at the same rate as small nucleic acids, allowing researchers to estimate the size of the fragments, while the other dye moves more slowly, providing a visual marker for the loading wells. This dual-dye system enhances precision in identifying migration patterns and ensures that samples are loaded correctly.