Pure-NA™ 1kb DNA ladder is designed for quantification of a range of DNA on agarose and polyacrylamide gels. It is composed of 12 purified individual DNA fragments in lengths of 250 bp, 500 bp, 750 bp, 1000 bp, 1500 bp, 2000 bp, 3000 bp, 4000 bp, 5000 bp, 6000 bp, 8000 bp, and 10000 bp.