Nucleic Acid Molecular Weight Markers

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.

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GeneRuler Express DNA Ladder, ready-to-use  Green features
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.
1 Kb Plus DNA Ladder  Green features
Powerful tool for estimating molecular weight of linear, double-stranded DNA fragments
E-Gel™ Ultra Low Range DNA Ladder  Green features
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
E-Gel™ 1 Kb Plus Express DNA Ladder  Green features
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
E-Gel™ Sizing DNA Ladder  Green features
Ready-to use DNA Ladder for use with routine throughput precast E-Gel™ agarose gels.
GeneRuler DNA Ladder Mix  Green features
Perform sizing and approximate quantification of a wide range of double-stranded DNA on agarose gels with Thermo Scientific™ Fermentas GeneRuler™ DNA Ladder Mix.
GeneRuler High Range DNA Ladder  Green features
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, ready-to-use 
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.
TrackIt™ 100 bp DNA Ladder  Green features
Invitrogen TrackIt 100 bp DNA Ladder is ready to use and designed for sizing and approximate quantification of double-stranded DNA in the range of 100 bp to 2,000 bp. 100 bp DNA Ladder consists of 13 individual chromatography-purified DNA fragments and has reference bands at 2000, 1500, and 600 bp...
E-Gel™ 1 Kb Plus DNA Ladder  Green features
Powerful tool for estimating molecular weight of linear, double-stranded DNA fragments
GeneRuler DNA Ladder Mix  Green features
Perform sizing and approximate quantification of a wide range of double-stranded DNA on agarose gels with Thermo Scientific™ Fermentas GeneRuler™ DNA Ladder Mix.
E-Gel™ 96 High Range DNA Marker  Green features
Suitable for sizing doublestranded DNA on all E-Gel™ gel formats
MassRuler Express Forward DNA Ladder Mix, ready-to-use, 100 to 10000 bp  Green features
Thermo Scientific MassRuler DNA Ladders are designed for accurate quantification and sizing of DNA fragments by agarose gel electrophoresis. Individuals DNA fragments are chromatography-purified and calibrated against a standard that guarantees precise quantity of each band.
FastRuler Ultra Low Range DNA Ladder, ready-to-use  Green features
Thermo Scientific FastRuler DNA Ladders is a fast and convenient tool for double-stranded DNA sizing during electrophoresis. It's specifically engineered for rapid sizing and approximate quantification of DNA on both conventional agarose gels and high-throughput E-Gels (in 48- and 96-well formats).
PCR Markers, Thermo Scientific Chemicals 
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DNA and RNA Molecular Weights and Conversions
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.
Nucleic Acid Stains, Ladders, and Markers Support
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?
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Product FAQ
How can I get better separation of my bands?
Product FAQ
With the AgriSeq HTS Library Kit, I see high molecular weight material present during sequencing. Why is this?