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The lanes shown in this figure were formed when electrically charged (ionic) DNA fragments, which had been dissolved in a solvent and spread on an agarose gel as a support medium, migrate across an electric field and are separated according to the speed of their migration as well as according to changes they undergo during their migration.
Original Repository:
University of California, San Francisco. Archives and Special Collections. Harold E. Varmus Papers
Location:
Box: 6. Folder: 16
Rights:
Reproduced with permission of the Regents of the University of California.