Molecular Weight Markers

Molecular weight markers are ideal for applications such as estimating the size of DNA or protein samples, assessing DNA fragment lengths, quality control, and validation. Molecular weight markers also provide excellent quality control during gel electrophoresis experiments. Rainbow protein ladders can also assist with identifying problems and can indicate any potential issues with the sample preparation and gel conditions. They can also improve the accuracy of size estimations. Protein molecular weight markers are a scale for estimating the size of a molecular weight of an unknown DNA or protein sample. MW markers contribute to the reliability and reproducibility of experiments and aid in the interpretation and analysis of DNA. Molecular weight markers are available from Thomas Scientific in various sizes and formats suitable for various laboratory DNA measurements.



Also available at Thomas Scientific – electrophoresis chambers and equipment.

Molecular Weight Markers

Products (46)

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  • HyperLadder™ 50bp

    Meridian (Bioline)

    Ready-to-use molecular weight marker, designed for easy size determination of nucleic acids from 50 bp to 2000 bp. Product Highlights Broad size range – 15 evenly distributed bands from 50 bp to 2000 bp Easy to orientate – several brighter reference bands Stable – can be stored at...

  • 100-1000bp DNA Markers

    10 DNA fragments: 100, 200, 300, 400, 500, 600, 700, 800, 900 and 1000bp. The intensity of the 500bp band is increased to yield an internal reference indicator 13 DNA fragments: 50, 100X2, 150, 200X2, 250, 300, 400, 500X2, 600, 700, 800, 900 and 1031bp: 13 DNA fragments: 50, 100, 150, 200, 250, 300,...

  • 1kb RNA Ladder

    Norgen Biotek

    No need for staining and destaining of denaturing gels since Norgen’s loading buffer contains ethidium bromide Highly stable Nine bands from 200 bases to 4000 bases Convenient lyophilized format provides better product stability The Norgen 1 kb RNA Ladder is a set of RNA transcripts derived from...

  • 500-10000bp DNA Marker, Ready To Use

    9 DNA fragments: 0.5kb, 1 kb, 2 kb, 3 kb, 4 kb, 5 kb, 6kb, 8kb, and 10kb: The DNA KB-Ladder includes 9 fragments ranging from 0.5-10.0 kilobases (KB). It is a mixture of several plasmids digested to completion with appropriate restriction enzymes. The intensity of the 3.0kb band has been increased...

  • 100-5000bp DNA Marker Plus, Ready-to-Use

    9 DNA fragments: 100, 250, 500, 750, 1000, 1500, 2000, 3000, 5000bp: 9 DNA fragments: 100, 250, 500, 750, 1000, 1500, 2000, 3000, 5000bp

  • DNA Ladder

    Bioneer

    1 kb DNA Ladder is designed for determining the size of double stranded DNA ranging between 500 to 10,000 bp. The 1 kb Ladder consists of DNA fragments 0.5, 1.0, 1.6, 2.0, 3 (2.961), 4, 5 (5.007), 6 (5.991), 8 and 10 (10.2) kb. The 2.961 kb band is approximately two times brighter for easy...

  • Diamond Ready-to-Use DNA Ladder 250-10Kbp, 500µL, Liquid (in 1x Loading Buffer)

    Diamond Ready-to-Use DNA Ladder 250-10Kbp has a suggested load volume is 5 µL/well.

  • Protein Molecular Weight Marker (14, 1000µL, Liquid (in 1x Loading Buffer)

    Protein Molecular Weight Marker is designed for use in accurate estimation of protein molecular weight in SDS-polyacrylamide gel electrophoresis and western blotting. Thaw the cocktail at room temperature. Gently invert vial several times to ensure that the solution is homogeneous and that any...

  • MidRanger 1kb DNA Ladder

    Ready-to-use Quantitative Highly Stable Precise Ten discrete fragments ranging from 300 bp to 5000 bp The Norgen MidRanger 1 kb DNA Ladder is prepared to ensure quality and batch-to-batch consistency. Our MidRanger contains ten discrete fragments ranging from 300 bp to 5000 bp. This Ladder is ideal...

  • 100 +50bp DNA Marker, Ready to Use

    11 DNA fragments:50, 150, 250, 350, 450, 550, 650, 750, 850, 1000, 1500bp (100 +50bp DNA Marker, Ready-to-use): 100 +50bp DNA Marker has 11 unique DNA bands ranging from 50-1500 base pairs (bp). It is specially designed for visualizing DNA bands in the ‘50’-bp position with sizes such as...

  • Clone Sizer 100bp DNA Ladder

    Ready-to-use Quantitative Highly Stable Precise Fourteen discrete fragments ranging from 100 bp to 2000 bp in 100 bp increments Higher intensity reference bands at 500 bp and 1000 bp 2686 bp (pUC19) reference band for easy clone identification The CloneSizer 100 bp DNA Ladder is prepared to ensure...

  • 10-250kDa Wide Range Prestained Protein Ladders

    Bio Basic prestained protein ladder is designed for estimating the approximate size of separated proteins on SDS-PAGE gel. The ladders are a mixture of recombinant proteins ranging from 10 kD to 250 kD. Red or green bands at 70 kD and 25 kD provide easy references for molecular weight...

  • 12 Epitope MBP Tag Protein Marker Lysate, 100µL, Liquid (in 1x Loading Buffer)

    This 12 Epitope Tag Protein Marker Lysate is designed for use as a positive control for anti-epitope tag antibodies. This E.coli lysate contains a recombinant protein comprised of the following commonly used epitope tags: MBP--T7--HSV--cMyc--VSV--Glu-Glu--V5--E-tag--Flag--S tag--HA--6XHis. A 58 kDa...

  • Diamond Ready-to-Use DNA Ladder 100-3000bp, 500µL, Liquid (in 1x Loading Buffer)

    Diamond Ready-to-Use DNA Ladder 100-3000bp has a suggested load volume is 5 µL/well.

  • bp Plus DNA Ladder

    100 bp Plus DNA Ladder was designed to determine the size of double stranded DNA fragments from 100 to 10,200 bp. The 100 bp Plus DNA Ladder consists of 19 double stranded molecular weight markers, ranging in size from 100 to 1,000 bp in 100 bp increments, and additional fragments of 1,200, 1,600,...

  • 50 bp DNA Ladder

    Norgen Biotek

    Ready-to-use Quantitative Highly Stable Precise 10 discrete bands from 50 bp to 500 bp Higher intensity reference band at 250 bp The 50 bp DNA Ladder is prepared to ensure quality and batch-to-batch consistency. This Ladder contains ten discrete fragments ranging from 50 bp to 500 bp with a higher...

  • 100-3000bp DNA Markers

    14 DNA fragments: 100, 200, 300, 400, 500x2, 600, 700, 800, 900 and 1000x2, 1200, 1500, 2000, 3000bp: 100-3000bp DNA Marker, ready-to use, contains a mix of 14 individual DNA fragments (in base pairs): 100, 200, 300, 400, 500, 600, 700, 800, 900 and 1000, 1200, 1500, 2000, 3000bp. The intensities of...

  • DNA Ladder

    Bioneer

    25/100 bp Mixed DNA Ladder is designed for determining the size of double stranded DNA from 25 to 2,000 bp. The ladder consists of 17 double stranded DNA fragments ranging in size from 25 to 200 bp in 25 bp increments, from 200 to 1,000 bp in 100 bp increments, and an additional fragment of 2,000...

  • 100 bp DNA Ladders

    IBI Scientific

    Ready-to-use DNA Ladder (pre-mixed with loading dye) Suitable for sizing double-stranded DNA from 100 bp to 3 Kb with enhanced intensity at 500 bp C852A58: Concentration: 2.5 µg / 25 µl; (Recommended loading: 0.5 µg or 5 µl) C852A59: Concentration: 50 µg / 500 µl;...

  • UltraRanger 1kb DNA Ladder

    Ready-to-use Quantitative Highly Stable Precise Fifteen discrete fragments ranging from 300 bp to 24000 bp Higher intensity reference bands at 5000 bp and 10000 bp The Norgen UltraRanger 1 kb DNA Ladder is prepared to ensure quality and batch-to-batch consistency. Our UltraRanger contains fifteen...

  • Diamond Ready-to-Use DNA Ladder 50-150bp, 500µL, Liquid (in 1x Loading Buffer)

    Diamond Ready-to-Use DNA Ladder 50-150bp has a suggested load volume is 5 µL/well.

  • PAGEmark™ Protein Markers

    PAGEmark™ Blue PLUS Protein Markers A blue protein standard with 12 prestained proteins covering a wide range of molecular weights:10-240kDa in Tris-Glycine buffer and9-235kDa in Bis-Tris (MOPS) buffer or Bis-Tris (MES) buffer. Proteins are covalently coupled with a blue chromophore and two...

  • 1 kb DNA Marker

    1 kb DNA Marker is composed of 9 bands which are 500 bp, 1,000 bp, 2,000 bp, 3,000 bp, 4,000 bp, 5,000 bp, 6,000 bp,8,000 bp and 10,000 bp. The 5,000 bp band with higher concentration is distinguished easily from others.

  • HyperLadder™ 1kb

    Meridian (Bioline)

    The 14 regularly spaced, easy to remember bands, ranging from 200 bp to 10,037 bp, with higher intensity reference bands at 1000 bp and 10,037 bp and a doublet band at 1500/1517 bp allow for easy identification and orientation of your band at a glance. Meridian Life Sciences, Inc. products are...

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