The 100bp DNA Ladder is a mixture of specially designed double-stranded DNA fragments for determining the exact size of PCR products and engineered DNA fragments. The 100bp DNA ladder marker consists of 11 DNA fragments ranging in size from 100 to 1,000 bp in 100 bp increments, and an additional 1,500, 2,000, and 3,000 bp fragment. For easy size reference on the gel electrophoresis, the 500 bp and 1,000 bp bands are two to three times brighter than the other bands. The 100bp DNA ladder marker is supplied in a ready-to-use format. This ladder marker can be stained with ethidium bromide or any other known DNA staining method.