Markers & ladders

BioNordika distributes a large selection of DNA, RNA and protein ladders in different sizes and formats.


For DNA electrophoresis NEB offers a wide range of double-stranded DNA molecular weight markers for electrophoresis including conventional DNA markers and DNA ladders, ranging from 10 bp up to 48.5 kb.  In addition, NEB offers 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 is no UV shadow.


RNA Markers and Ladders from NEB ranges from 17 to 9,000 bases to be applied for:


- ssRNA Ladders suitable for use as RNA size standards on denaturing or native gels

- microRNA Markers used as a size marker on denaturing polyacrylamide gels or Northern blots

- dsRNA Ladders suitable for use as a size standard in dsRNA and RNAi analysis on both denaturing polyacrylamide and agarose gels


Protein standards from NEB are highly pure and ranges in size 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, as well as a colored prestained protein standard with multi-colored bands for easy identification. Standards are provided pre-mixed with loading buffer and reducing agent.