DNA Markers are manufactured with globally advanced production technology--using restriction enzymes to digest plasmids, resulting in not only low background but also sharp and tight bands. They provide much higher accuracy and stability than DNA markers coming from PCR amplification products. All DNA markers are ready-to-load with optimal loading buffers and can be directly and conveniently used in electrophoresis. DNA Markers can be stored at 4℃ for 6 months or -20℃ for 2 years. They are not recommended for PAGE.