The following reagents are supplied with this product:

NEB #	Component Name	Component #	Stored at (°C)	Amount	Concentration
N0557S     4       Quick-Load® Purple Low Molecular Weight DNA Ladder N0557SVIAL 4 1 x 1.25 ml 50 µg/ml   Gel Loading Dye, Purple (6X), no SDS B7025SVIAL 25 1 x 1 ml 6 X

Companion Products

• Low Molecular Weight DNA Ladder
• Quick-Load® Purple 100 bp DNA Ladder
• Gel Loading Dye, Purple (6X), no SDS
• Quick-Load Purple 50 bp DNA Ladder

1. Preparation of DNA: The double-stranded DNA is digested to completionwith appropriate restriction enzymes, phenol extracted and equilibratedin storage buffer.
2. We recommend loading 10 μl (0.5 μg) of Quick-Load Purple Low Molecular Weight DNALadder per gel lane. In general, it is recommended to load 1 µl per mmof gel lane.
3. The Quick-Load Purple Low Molecular Weight DNA Ladder is not intended for precisequantification of DNA mass but can be used for approximating the mass ofDNA in comparably intense samples of similar size.
4. Quick-Load Purple Low Molecular Weight DNA Ladder is stable for at least 6 months at 25°C. For long term storage, store at 4°C or -20°C. If stored at -20°C, mix well after thawing. If not well mixed, the load may float out of the wells.
5. 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

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

1. Protocol for Quick-Load Purple Low Molecular Weight DNA Ladder (NEB #N0557)

• DNA Markers & Ladders Selection Tool

1. Why are there extra bands visible on polyacrylamide gels?
2. Can I use Midori Green with the DNA Ladders from NEB?
3. Can I use SYBR^® and/or GelRed^® dyes with the DNA Ladders from NEB?
4. Why is my DNA Ladder floating out the wells and Why are there no bands visible in my DNA ladder gel lane?
5. Can I use GelRed^® with the Low Molecular Weight and 50 bp DNA Ladders from NEB?

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.

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]

• N0557S_v1

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]

• N0557S_v1_0011608
• N0557S_v1_0011612
• N0557S_v1_0011704
• N0557S_v1_0011709
• N0557S_v1_0011803
• N0557S_v1_0021804
• N0557S_v1_10019441
• N0557S_v1_10045826
• N0557S_v1_10062737
• N0557S_v1_10085990
• N0557S_v1_10100712
• N0557S_v1_10104050
• N0557S_v1_10126710
• N0557S_v1_10152597
• N0557S_v1_10176564
• N0557S_v1_10212058
• N0557S_v1_10241003
• N0557S_v1_10280848

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

• Quick-Load^® Purple Low Molecular Weight DNA Ladder
• Gel Loading Dye, Purple (6X), no SDS

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.