We offer a broad selection of Thermo Scientific DNA ladders with fragment sizes ranging from 10 bp to 48.5 kb, for accurate analysis of linear double-stranded DNA in agarose or polyacrylamide gels. DNA ladders are manufactured and quality controlled to supersede industry standards. DNA ladders are made of chromatography-purified individual DNA fragments using a proprietary technology for preparation of pharmaceutical-grade plasmid DNA. DNA ladders are stable during prolonged incubation at room temperature and multiple freeze-thaw cycles.
GeneRuler DNA Ladders
Ideal for sizing and approximate quantification of a wide range of double-stranded DNA. Supplied in standard and ready-to-use formats.
MassRuler DNA Ladders
Specially designed for accurate quantification and sizing of DNA fragments in agarose gels.
Lambda, Phage, and Plasmid DNA Markers
Conventional DNA molecular weight markers.
FastRuler DNA Ladders
Fast-separating ladders, designed for accurate sizing of double-stranded DNA (especially PCR products) in conventional, 48- or 96-well high-throughput gels.
Express DNA Ladders
Fast-separating versions of our popular ladders, designed for fast and accurate sizing under a range of electrophoresis conditions.
Loading Dyes, Agarose, and Buffers
Convenient reagents and buffers to achieve optimal electrophoresis results.
O’RangeRuler DNA Ladders
Step-ladders with exact repeats of a DNA fragment, designed for precise sizing of DNA in agarose or non-denaturing polyacrylamide gels.
NoLimits DNA Fragments
Individual, highly purified DNA fragments, useful for researchers wanting to create custom ladders.
Thermo Scientific DNA Ladder selection guide
| Range, bp | Agarose gel resolution time | Origin | Formulation | Loading dyes supplied | |
|---|---|---|---|---|---|
| NoLimits Custom DNA Ladders | 10-20,000 | Composition dependent | Individual, chromatography-purified DNA fragments | In TE buffer or ready-to-use | Any Thermo Scientific loading dye upon request |
| GeneRuler and O'GeneRuler DNA Ladders | 10-48,502 | 10 min–1.5 hr | Mixtures of individual, chromatography-purified DNA fragments | In TE buffer or ready-to-use | 6X DNA Loading Dye or 6X Orange Loading Dye |
| MassRuler DNA Ladders | 80-10,000 | 10–45 min | Mixtures of individual, chromatography-purified DNA fragments | Ready-to-use | 6X MassRuler Loading Dye |
| FastRuler DNA Ladders | 10-10,000 | 8–14 min | Mixtures of 5 individual, chromatography-purified DNA fragments | Ready-to-use | 6X MassRuler Loading Dye, 6X Orange Loading Dye |
| O'RangeRuler DNA Ladders | 10-6,000 | 45 min–1.5 hr | Ligated 5, 10, 15, 20, 50, 100, 200, 500 bp DNA fragments | Ready-to-use | 6X Orange Loading Dye |
| ZipRuler Express DNA Ladders | 100-20,000 | 10–20 min | Mixtures of individual, chromatography-purified DNA fragments | Ready-to-use | 6X Orange Loading Dye, 6X MassRuler Loading Dye |
| Conventional DNA Markers | 8-23,130 | 45 min–18 hr | Digested lambda, phage and plasmid DNA | In TE buffer or ready-to-use | 6X DNA Loading Dye |
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