Product Class: Other

50 bp DNA Ladder

This product is available in our Quick-Load Purple format - enjoy the convenience of a ready-to-load format.

Product Introduction

  • Size range: 50 bp - 1350 bp
  • Supplied with free vial of Gel Loading Dye, Purple (6X), no SDS (NEB #B7025)
  • Easy-to-identify reference bands
  • Small size suitable for 200 gel lanes; large size suitable for 1000 gel lanes


50 bp DNA Ladder visualized by ethidium bromide staining on a 3% TBE agarose gel. Mass values are for 1 µg/lane.
Catalog # Size Concentration
N3236S 200.0 gel lanes (0.1 ml) 1000 µg/ml
N3236L 1000.0 gel lanes (0.5 ml) 1000 µg/ml

Product Information

Description

A number of proprietary plasmids are digested to completion with appropriate restriction enzymes to yield 17 bands suitable for use as molecular weight standards for agarose and polyacrylamide gel electrophoresis. The digested DNA includes fragments ranging from 50-1,350 base pairs. The 200 and 500 base pair bands have increased intensity to serve as reference points.

Comes supplied with 1 vial of Gel Loading Dye, Purple (6X), no SDS.


This product is related to the following categories:
DNA Markers & Ladders Products
This product can be used in the following applications:
DNA Analysis

Reagents Supplied

Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration

Properties & Usage

Bases

Fragment Mass (ng) bp
1 103 1350
2 70 916
3 58 766
4 54 700
5 50 650
6 46 600
7 42 550
8 76 500
9 34 450
10 31 400
11 27 350
12 46 300
13 57 250
14 107 200
15 46 150
16 69 100
17 84 50

Effective Size Range

50bp to 1,350bp

Storage Buffer

10 mM Tris-HCl
1 mM EDTA
pH 8 @ 25°C

Product Notes

  1. The 50 bp DNA Ladder was not designed for precise quantification of DNA mass but can be used for approximating the mass of DNA in comparably intense samples of similar size.
  2. All ends have 5´ overhangs that can be end labeled using T4 Polynucleotide Kinase (#M0201) or filled-in using DNA Polymerase I, Klenow Fragment (#M0210) (1). Use α-[32P] dCTP or α-[32P] dGTP for the fill-in reaction.
  3. 50 bp DNA Ladder is stable for at least 3 months at 4°C.
  4. For long term storage, store at -20°C. If samples need to be diluted, use TE or other buffer of minimal ionic strength. DNA may be denatured if diluted in dH2O.
  5. We recommend loading 0.5-1.0 µg of 50 bp DNA Ladder diluted in sample buffer.
  6. 1X Gel Loading Dye, Purple, no SDS: 
    2.5% Ficoll®-400
    10 mM EDTA
    3.3 mM Tris-HCl (pH 8.0@25°C)
    0.02% Dye 1
    0.001% Dye 2
  7. Due to the limitations of the acrylamide gel technology, one or two extra bands may be visible on the DNA ladders when run on a polyacrylamide gel.

References

  1. Sambrook, J., Fritsch, E.F. and Maniatis, T. (1989). Molecular Cloning: A Laboratory Manual,(2nd ed.). 10.51-10.67.

Protocols, Manuals & Usage

Protocols

  1. End-labeling Protocol
  2. Suggested Loading Protocol for DNA Ladders & Markers

Tools & Resources

Selection Charts

FAQs & Troubleshooting

FAQs

  1. Why are there extra bands visible on polyacrylamide gels?
  2. Why is the separation of the lower bands incomplete?
  3. What are the overhangs on the DNA ladder fragments? Can I end-label them using the T4 polynucleotide kinase (PNK)? What about the Klenow fragment?
  4. Why are the DNA ladders showing up on my Southern blot? What is the sequence or composition of the ladder bands?
  5. How can I quantify the amount of DNA in each band of a marker?
  6. Can I use Midori Green with the DNA Ladders from NEB?
  7. Can I use SYBR® and/or GelRed® dyes with the DNA Ladders from NEB?
  8. Why is my DNA Ladder floating out the wells? Why are there no bands visible in my DNA ladder gel lane?
  9. Can I use GelRed® with the Low Molecular Weight and 50 bp DNA Ladders from NEB?

Tech Tips

To make it ready-to-load, dilute in TE buffer instead of water.

Quality, Safety & Legal

Quality Assurance Statement

Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.

Specifications

The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]

Certificate Of Analysis

The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]

Safety DataSheets

The following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.

Legal and Disclaimers

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email busdev@neb.com.

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.

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