O'RangeRuler™ DNA ladders are step ladders that consist of basic unit repeats of 10, 15, 20, 50, 100, 200, or 500 bp. The ladders have a higher density of bands at a specific DNA size range and are therefore suitable for more accurate sizing of DNA in agarose or non denaturing polyacrylamide gels.

• Step ladders - ligation products of DNA fragments of equal increments
• Sharp bands, evenly spaced reference bands
• Ready to use - premixed with loading dye for direct loading
• Room temperature storage
• Supplied with loading dye for sample DNA