Perfect™ 100-1000 bp DNA Ladder is DNA ladder with 100 bp increments for sizing small-to-medium DNA fragments. Ideal for sizing linear double-stranded DNA fragments from 100 to 1000 bp. Contains 10 bands with fragments of the following sizes: 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 bp. Band at 500 bp is three times brighter for easy reference on agarose gels. Can be 5′-end labeled with radioisotopes and T4 Polynucleotide Kinase for visualization by autoradiography after a dephosphorylation step.