Product Class: Other

Low Molecular Weight 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: 25 bp to 766 bp
  • Value pricing
  • Supplied with free vial of Gel Loading Dye, Purple (6X), no SDS (NEB #B7025).
  • Easy to identify reference bands
  • Small size suitable for 100 gel lanes; large size suitable for 500 gel lanes
Low Molecular Weight DNA Ladder

 

Bioz Badge Exists : True
Catalog # Size Concentration
N3233S 100 gel lanes (0.1 ml) 500 µg/ml
N3233L 500 gel lanes (0.5 ml) 500 µg/ml

Product Information

Description

A proprietary plasmid is digested to completion with appropriate restriction enzymes to yield 11 bands suitable for use as molecular weight standards for both agarose and polyacrylamide gel electrophoresis. This digested DNA includes fragments ranging from 25-766 base pairs. The 200 base pair band has increased intensity to serve as a reference point. Comes supplied with 1 vial of Gel Loading Dye, Purple (6X), no SDS.

 

Figure 1: Gel Loading Dye, Purple (6X)

Low Molecular Weight DNA Ladder

This product is related to the following categories:
DNA Markers & Ladders
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 42 766
2 27 500
3 20 350
4 33 300
5 27 250
6 110 200
7 33 150
8 43 100
9 58 75
10 63 50
11 43 25

Effective Size Range

25bp to 766bp

Storage Buffer

10 mM Tris-HCl
1 mM EDTA
pH 8 @ 25°C

Product Notes

  1. We recommend loading 0.5 µg of the Low Molecular Weight DNA Ladder diluted in sample buffer.
  2. This 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.
  3. 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.
  4. DNA ladders are stable for at least 3 months at 4°C.
  5. 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 denature if diluted in dH2O
  6. 1X Gel Loading Dye, Purple, no SDS: 
    2.5% Ficoll®-400
    10mM EDTA
    3.3mM 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.

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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