NEB offers a variety of DNA Ladders with sizes ranging from 25 bp to 48.5 kb for use in agarose gel electrophoresis. NEB also offers a wide range of double-stranded DNA molecular weight markers for conventional agarose gel electrophoresis. These standards have a size range of approximately 10 bp to 23,000 base pairs.
The typical pattern generated by each of our markers and ladders is shown below. Fragment sizes are indicated alongside of the image. Relative mass values are also shown, when appropriate.
Our 2-log, 1 kb and 100 bp DNA Ladders are offered in four formats. Choose from the conventional ladder, the Quick-Load® version (using either non-fluorescing purple dye or bromophenol blue) or TriDye®™ (containing three dyes to facilitate the monitoring of migration). Quick-Load Purple versions also include a vial of dye, free of charge.