GRS High Range Ladder is a ready-to-use DNA marker suitable for sizing linear double-stranded DNA fragments from 250bp-15000bp. This DNA marker is composed of 7 linear chromatography-purified individual DNA fragments. All bands (except 2500bp) are supplied at approximately 50ng/5μl. The 2500bp band has increased intensity relative to the other bands on an ethidium bromide-stained agarose gel.