DNA and RNA size markers contain a mixture of DNA (or RNA) fragments of known length, making them suitable for estimating the fragment length of concurrently run samples. They stain well with ethidium bromide and other common nucleic acid stains for visualization after gel electrophoresis. For more information and background, please visit the Introduction to Markers and Ladders.
Standard DNA Markers
Agarose gel electrophoresis requires standard DNA markers. We have markers in three sizes, also available in a convenient, ready-to-use DirectLoad™ version:
Digested DNA Markers
Agarose gel electrophoresis for size determination of DNA digest fragments benefits from markers prepared as fragments of digested DNA. We have seven DNA digest marker choices:
PCR Markers
Agarose or polyacrylamide gel electrophoresis for size determination of PCR fragments benefits from markers designed for use with PCR fragments. We have four PCR marker choices:
RNA Markers
RNA electrophoresis requires markers prepared from RNA.