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The Supercoiled DNA Ladder contains fragments from 2 kb to 10 kb at 1-kb increments and an additional band at 12 kb. Each supercoiled band is at a known concentration, with the 7-kb band at a higher concentration than the others. The resulting brighter band in the middle of the ladder acts as a useful reference point.
  •  Accurate size determination facilitated by evenly spaced bands
  •  Fragments are exact multiples of 1000 bp
  •  Includes useful reference point for determining location
  •  More economical than comparable markers
  •  10 fragments ranging in size from 2 kb to 12 kb