Loading Buffers

DNA loading buffers are used for loading DNA samples onto agarose or SDS DNA gels for gel electrophoresis. DNA loading buffers contains a coloured dye and a density agent. The density agent serves to enhance the density of the DNA sample allowing the DNA to sink into the bottom of the well. The dye adds visibility to the DNA sample and also serves as a tracking dye allowing the user to monitor the DNA migration during electrophoresis.