Molecular Weight Markers

Supplier: Biotium

A visible three- colour protein marker for SDS-PAGE or western blotting, with 12 bands ranging from 8 to 245 kDa.

Supplier: Thermo Fisher Scientific

This wide range molecular weight marker contains 60 ng/μl of 21 fragments from 100 bp to 12000 bp. The bands appear in 100 bp increments from 100 to 1000 bp and in 1000 bp increments from 1 to 12 kb. Bands at 1 kb and 5 kb stain brighter to aid identification.

Supplier: Thermo Fisher Scientific

From 250 to 5000 base pairs: 5 bands from 125 to 1000 bp; four bands from 1500 to 5000 bp. Recommended load volume 20 µl.

Supplier: Thermo Fisher Scientific

DNA ladders are used in gel electrophoresis to determine the size and quantity of testing DNA fragments of genomic, plasmid, and PCR DNA. They are commonly used in the studies of plasmid DNA and PCR products.

Supplier: Merck Millipore (Novagen)

PCR Molecular Size Marker contains a mixture of eight defined DNA fragments ranging from 50 to 2000 bp at convenient size intervals for characterising small DNA products. The markers are supplied in gel loading buffer containing two tracking dyes that do not interfere with UV illumination of ethidium bromide-stained bands. A separate vial of 6X Loading Buffer is included. Each vial of markers is sufficient for 50 lanes on TBE or TAE agarose stained with ethidium bromide. The recommended amount for loading (5 µl) produces bands of even intensity that are bright, sharp and easy to photograph.

Supplier: Merck Millipore (Novagen)

The Perfect DNA™ ladders contain sets of DNA species having convenient, easy-to-remember sizes for agarose gel analysis. The markers have uniform band intensities and cover a wide range of DNA sizes.

Supplier: LONZA

QuantLadders are prepared from five highly purified DNA fragments that provide visual quantitation of DNA within ±1% accuracy. The DNA QuantLadder provides each DNA fragment in perfect relative mass equivalence at 100 ng, 70 ng, 50 ng, 20 ng and 10 ng. The reverse QuantLadder simply reverses the mass equivalence order of the QuantLadder.

Supplier: PanReac AppliChem

This DNA ladder is ideal for determining the size of double-stranded DNA ranging from 100 to 1,000 base pairs. The ladder consists of ten fragments that range in size from 100 to 1,000 bp in 100 bp increments. The 500 bp fragment is present at increased intensity to allow easy identification. All fragments are blunt-ended.

Supplier: PanReac AppliChem

The main applications for prestained protein markers are the monitoring of protein migration during SDS-PAGE, verification of Western transfer efficiency on membranes, and estimation of protein sizes on SDS-polyacrylamide gels and Western blots.

Supplier: LONZA

Thse DNA ladders provides rapid and easy size determination of the DNA samples. Each band has an ideal 50 % G-C content for precise sizing and sharp resolution. It is free from contaminating plasmid DNA with minimal background.

Supplier: Cytiva

Rainbow™ molecular weight markers enable faster and simpler identification of proteins on SDS polyacrylamide gels. These ready to load markers provide sharper, more intense bands on gels and blots, and have improved band spacing for more accurate molecular weight determination. The bright, distinctive colours of the markers allow easier confirmation of transfer to blotting membranes and orientation.

Supplier: Cytiva

pI markers are lyophilized mixtures of stable, salt-free, highly purified proteins.

Supplier: Cytiva

For determination of molecular weight of uncharacterised protein samples with precision by comparison with carefully selected standards.

Supplier: Cytiva

Amersham™ ECL™ Plex™ fluorescent Rainbow™ markers are protein molecular weight markers optimised for use with the ECL™ Plex™ Western blotting detection system. They are designed to provide visible marker bands on gels and membranes, as well as fluorescent images using Cy3 and Cy5 channels.

Supplier: Genscript

GenScript offers a wide selection of Protein molecular weight standards for SDS-PAGE and Western blot, including prestained, unstained, peptide, Western-viewable, and other standards.

Supplier: Cytiva

Amersham™ ECL™ DualVue™ Western blotting markers perform two key functions. Firstly, the prestained marker proteins confirm protein transfer in addition to clearly defining blot orientation. Secondly, the recombinant tagged proteins are detected on film or by CCD imaging in conjunction with the target protein(s) of interest, enabling highly accurate molecular mass determination of the target protein(s). The tagged markers are detected easily and specifically by means of a specific conjugate that eliminates any cross contamination between target protein(s) and markers.