The Kb DNA Ladder contains fragments from 1 kb to 10 kb at 1-kb increments, as well as bands at 250 bp, 500 bp, 750 bp, 1500 bp and 12 kb. The bands at the ladder™s upper end are brighter than those at the lower end, with the transition to higher intensity at the 2-kb band serving as a useful reference point.
Fragments are exact multiples or fractions of 1000 bp
Includes useful reference point for determining location
More economical than comparable markers
Easy radiolabeling of ladder
Known mass amount of each fragment for DNA quantitation
15 fragments ranging in size from 250 bp to 12 kb
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