Search Thermo Fisher Scientific
Nucleic Acid Molecular Weight Markers
Browse our selection of nucleic acid molecular weight markers for precise DNA and RNA size determination in gel electrophoresis. These markers contain nucleic acids of pre-defined molecular weights, serving as essential size standards. Our catalog includes DNA ladders, RNA markers, and various fragments available with or without loading buffers and tracking dyes. Choose from a range of options suitable for agarose and polyacrylamide gels, offering accurate sizing and quantification of double-stranded DNA fragments across different molecular weight ranges. Learn more about DNA ladders or RNA ladders.
Read more
Products (96)
Learn More (220)
Documents & Support
(141)96 Products
Filter
Thermo Scientific GeneRuler DNA Ladders serve as precise molecular weight markers for the sizing and approximate quantification of double-stranded DNA fragments, accommodating a range from 10 bp up to 48.5 kb.
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
Powerful tool for estimating molecular weight of linear, double-stranded DNA fragments
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
Perform sizing and approximate quantification of a wide range of double-stranded DNA on agarose gels with Thermo Scientific™ Fermentas GeneRuler™ DNA Ladder Mix.
Powerful tool for estimating molecular weight of linear, double-stranded DNA fragments
GeneRuler High Range DNA Ladder is recommended for fast sizing and approximate quantification of high molecular weight double-stranded DNA on agarose gels (in 1.5hour, 0.4%agarose gel). The ladder is a mixture of chromatography-purified individual DNA fragments.
RiboRuler Low Range RNA Ladder 100-1000 bases, ready-to-use is a mixture of 7 chromatography purified single-stranded RNA transcripts (100-1000 bp long), produced from specific templates that contain a fragment of the pTZ19R polylinker and Lambda phage fragments.
A set of six RNA transcripts with lengths of 0.2, 0.5, 1.0, 2.0, 4.0, and 6.0kb
Perform sizing and approximate quantification of a wide range of double-stranded DNA on agarose gels with Thermo Scientific™ Fermentas GeneRuler™ DNA Ladder Mix.
Suitable for sizing doublestranded DNA on all E-Gel™ gel formats
DNA ladders are used in gel electrophoresis to determine the size and quantity of testing DNA fragments of genomic, plasmid, and PCR DNA. It is commonly used in the studies of plasmid DNA and PCR products.
Thermo Scientific O'RangeRuler DNA Ladders are designed for precise sizing of PCR products and other double-stranded DNA fragments in agarose or non-denaturing polyacrylamide gels. O'RangeRuler series is characterized by its 'step ladder' design.
Invitrogen 50 bp DNA Ladder is designed for sizing and approximate quantification of double-stranded DNA in the range of 50 bp to 2,500 bp.
Learn More (220)
View all
See our nucleic acid isolation and analysis products, Exact M.W. of ssRNA (e.g., RNA Transcript): M.W. = (An x 329.2) + (Un x 306.2) + (Cn x 305.2) + (Gn x 345.2) + 159ª An, Un, Cn, and Gn are the number of each respective nucleotide within the polynucleotide. M.W.
For Research Use Only. Not for use in diagnostic procedures., View all How can I view DNA on my E-Gel® Agarose Gels with SYBR® stain? Do you offer a DNA loading buffer for DNA samples and/or a ladder for electrophoresis? What is the difference between your SYBR® Safe™ Stain and ethidium bromide?
Documents & Support (141)
View all
How can I get better separation of my bands?
With the AgriSeq HTS Library Kit, I see high molecular weight material present during sequencing. Why is this?