Markers & Ladders

DNA Molecular Weight Markers

New England Biolabs sells a wide range of double-stranded DNA molecular weight markers for electrophoresis. We offer conventional DNA markers as well as a wide range of DNA ladders, ranging from 10 bp up to 48.5 kb. We also offer markers suitable for use in Pulsed-field gel electrophoresis (PFGE) extending up to > 1000 kb. DNA ladders from NEB are available in a variety of formats, including different ready-to-load formats as well as standard formats without pre-mixed loading dye. All standard ladders are provided with a vial of purple loading dye for added convenience. With our popular Quick-Load Purple DNA Ladders, take advantage of crisp bands and improved visibility, as there’s no UV shadow.

RNA Markers and Ladders

Our RNA ladders and markers have a size range of up to 9,000 bases. These include the Low Range ssRNA Ladder (NEB #N0364), ssRNA Ladder (NEB #N0362), dsRNA Ladder (NEB #N0363), and microRNA Marker (NEB #N2102).

Protein Standards

New England Biolabs offers a selection of highly pure protein standards. Sizes range from 10 to 250 kDa which is ideal for accurate molecular weight determination for a wide range of expressed proteins. We offer a blue prestained protein standard (NEB #P7718), as well as a colored prestained protein standard (NEB #P7719) with multi-colored bands for easy identification. Standards are provided pre-mixed with loading buffer and reducing agent.

Markers & Ladders

Markers & Ladders Subcategories

Markers & Ladders includes these subcategories:

DNA Markers & Ladders
Protein Standards
Quick-Load Purple DNA Ladders
RNA Markers & Ladders
Gel Loading Buffers

FAQs for Markers & Ladders

Does NEB carry an RNA ladder?
What are the differences in the four versions of 2-Log, 100 bp and 1 kb DNA Ladders that NEB sells?
Where can I find sequence and restriction maps of NEB's expression vectors?

Protocols for Markers & Ladders

Suggested Protocol for Loading the Unstained Protein Ladder, Broad Range (P7703)

Tools & Resources

Brochures

Protein Expression & Purification Brochure
PCR Reagents Brochure

Comparison of NEB to Other Commercially Available DNA Ladders

Ladder Comparison
Comparison of the NEB 1kb (left) and 100bp (right) DNA Ladders to other commercially available DNA Ladders. Note: The 500 bp DNA Ladder from Roche is used in the 1 kb DNA Ladder comparison.

DNA Markers & Ladders

A series of gel electrophoresis images displaying DNA bands of various sizes, labeled with molecular weight markers.

DNA Markers & Ladders Selection Chart

NEB DNA Markers and Ladders Selection Chart
NEB offers a variety of DNA ladders with sizes ranging from 25 bp to 40 kb for use in agarose gel electrophoresis. NEB also offers double-stranded DNA molecular weight markers for conventional with sizes ranging from 10 bp to 23,000 base pairs for use in agarose gel electrophoresis.

Protein Markers & Ladders

protein ladders

RNA Markers & Ladders

Gel electrophoresis images showing dsRNA and ssRNA bands with various markers and ladders for size comparison.
RNA Markers and Ladders

Our RNA ladders and markers have a size range of up to 9,000 bases. These include the Low Range ssRNA Ladder (NEB #N0364), ssRNA Ladder (NEB #N0362), dsRNA Ladder (NEB #N0363), and microRNA Marker (NEB #N2102).

Protein Standards

New England Biolabs offers a selection of highly pure protein standards. Sizes range from 10 to 250 kDa which is ideal for accurate molecular weight determination for a wide range of expressed proteins. We offer a blue prestained protein standard (NEB #P7718), as well as a colored prestained protein standard (NEB #P7719) with multi-colored bands for easy identification. Standards are provided pre-mixed with loading buffer and reducing agent.

Markers & Ladders Resources
Subcategories
FAQs
Protocols
Tools & Resources
Comparison of NEB to Other Commercially Available DNA Ladders
DNA Markers & Ladders
DNA Markers & Ladders Selection Chart
Protein Markers & Ladders
RNA Markers & Ladders
Legal Information
Markers & Ladders Subcategories
DNA Markers & Ladders
Protein Standards
Quick-Load Purple DNA Ladders
RNA Markers & Ladders
Gel Loading Buffers
Ready-to-load DNA ladders are stable at room temperature for 6 months
Featured Products
Quick-Load® Purple 1 kb Plus DNA Ladder
1 kb Plus DNA Ladder
1 kb Plus DNA Ladder for Safe Stains
Quick-Load® Purple 100 bp DNA Ladder
100 bp DNA Ladder
Quick-Load® Purple 1 kb DNA Ladder
1 kb DNA Ladder
Color Prestained Protein Standard, Broad Range (10-250 kDa)

Markers & Ladders

Markers & Ladders

Blue Prestained Protein Standard, Broad Range (11-250 kDa)
Color Prestained Protein Standard, Broad Range (10-250 kDa)
Supercoiled Extend DNA Ladder
Unstained Protein Standard, Broad Range (10-200 kDa)

DNA Markers & Ladders

1 kb DNA Ladder
1 kb Plus DNA Ladder
1 kb Plus DNA Ladder for Safe Stains
100 bp DNA Ladder
50 bp DNA Ladder
Fast DNA Ladder
Lambda DNA HindIII Digest
Lambda PFG Ladder
Low Molecular Weight DNA Ladder
MidRange PFG Marker
pBR322 DNA-BstNI Digest
pBR322 DNA-MspI Digest
PCR Marker
Quick-Load® 1 kb DNA Ladder
Quick-Load® 1 kb Extend DNA Ladder
Quick-Load® 1 kb Plus DNA Ladder
Quick-Load® 100 bp DNA Ladder
Quick-Load® Purple 1 kb DNA Ladder
Quick-Load® Purple 1 kb Plus DNA Ladder
Quick-Load® Purple 100 bp DNA Ladder
Quick-Load® Purple 50 bp DNA Ladder
Quick-Load® Purple Low Molecular Weight DNA Ladder
Supercoiled Extend DNA Ladder
TriDye™ 1 kb DNA Ladder
TriDye™ 1 kb Plus DNA Ladder
TriDye™ 100 bp DNA Ladder
TriDye™ Ultra Low Range DNA Ladder
λ DNA-BstEII Digest
λ DNA-Mono Cut Mix
ΦX174 DNA-HaeIII Digest

Protein Standards

Blue Prestained Protein Standard, Broad Range (11-250 kDa)
Blue Protein Loading Dye
Color Prestained Protein Standard, Broad Range (10-250 kDa)
Unstained Protein Standard, Broad Range (10-200 kDa)

Quick-Load Purple DNA Ladders

Gel Loading Dye, Purple (6X)
Gel Loading Dye, Purple (6X), no SDS
Quick-Load® Purple 1 kb DNA Ladder
Quick-Load® Purple 1 kb Plus DNA Ladder
Quick-Load® Purple 100 bp DNA Ladder
Quick-Load® Purple 50 bp DNA Ladder
Quick-Load® Purple Low Molecular Weight DNA Ladder

RNA Markers & Ladders

dsRNA Ladder
Low Range ssRNA Ladder
microRNA Marker
RNA Loading Dye, (2X)
ssRNA Ladder

Gel Loading Buffers

Blue Protein Loading Dye
Gel Loading Dye, Blue (6X)
Gel Loading Dye, Orange (6X)
Gel Loading Dye, Purple (6X)
Gel Loading Dye, Purple (6X), no SDS
RNA Loading Dye, (2X)