This marker consists of nine double-stranded DNA fragments (100, 250, 500, 750, 1,000, 1,500, 2,000, 3,000, and 5,000 bp). The 1,000 bp fragment is brighter than the other fragments and serves as a visible reference indicator; all other fragments appear with equal intensity on the gel. Since this product is premixed with loading dyes and glycerol, it is possible to use this product directly in agarose gel electrophoresis.