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