The ZR DNA Markers are defined DNA size fragments that encompass a range of sizes from 50bp up to 10kb. This makes DNA size approximation easy for both PCR products as well as plasmid DNAs. The ZR 50bp DNA Marker, ranging from 50bp to 1200bp, is well within the common range of PCR generated DNA fragments. For larger DNAs, the ZR 100bp DNA Marker and ZR 1kb DNA Marker are appropriate. Inclusion of an intensified band is provided in each marker for easy identification. Each marker comes with product information detailing the product and its application.