Protein Molecular Weight Markers

Protein Molecular Weight Markers
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Thermo Scientific™ PageRuler™ Unstained Protein Ladder
Unstained mixture of 14 recombinant, highly purified proteins (10kDa to 200kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and western blotting.

Number of Markers | 14 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 200, 150, 120, 100, 85, 70, 60, 50, 40, 30, 25, 20, 15, 10 kDa |
Ready to Load | Yes |
Stain Type | Unstained |
Size Range | 10 to 200 kDa |
Product Line | PageRuler™ |
Thermo Scientific™ PageRuler™ Unstained Broad Range Protein Ladder
A mixture of 11 proteins (5 to 250kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and Western blotting.

Number of Markers | 11 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 250, 150, 100, 70, 50, 40, 30, 20, 15, 10, 5 kDa |
Ready to Load | Yes |
Stain Type | Unstained |
Size Range | 5 to 250 kDa |
Product Line | PageRuler™ |
Thermo Scientific™ Pierce™ Prestained Protein MW Marker
Thermo Scientific Prestained Protein Molecular Weight Marker is a mixture of six blue-stained natural proteins (20 to 120 kDa) for use as size standards in protein electrophoresis (SDS-PAGE).

Content And Storage | Storage Buffer: 62.5 mM Tris · H3PO4 (pH 7.5 at 25°C), 1 mM EDTA, 2% (w/v) SDS, 1 mM DTT, 1.5 mM NaN3 and 33% (v/v) glycerol. Upon receipt store at -20°C. Product is shipped with an ice pack. |
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Number of Markers | 6 |
Product Type | Protein Molecular Weight (MW) Marker |
Molecular Weight (g/mol) | 120, 85, 50, 35, 25, 20 kDa |
Ready to Load | Yes |
Stain Type | 1 color: Blue |
Size Range | 20 to 120 kDa |
Product Line | Pierce™ |
Detection Method | Colorimetric |
Thermo Scientific™ Spectra™ Multicolor High Range Protein Ladder
A mixture of eight blue-, green- and orange-stained proteins (40 to 300kDa) for use as size standards for high MW proteins in gel electrophoresis and Western blotting.

Number of Markers | 8 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 300, 250, 180, 130, 100, 70, 50, 40 kDa |
Ready to Load | Yes |
Stain Type | 3 colors: Blue, Orange, Green |
Size Range | 40 to 300 kDa |
Product Line | Spectra™ |
Detection Method | Colorimetric, NIR Fluorescence (700 nm), RGB Fluorescence (555 nm) |
Thermo Scientific™ Spectra™ Multicolor Broad Range Protein Ladder
Thermo Scientific™ Spectra Multicolor Broad Range Protein Ladder is a 4-color protein standard containing 10 prestained proteins (10 to 260 kDa) for use as size standards in gel electrophoresis and Western blotting.

Shipping Condition | Approved for shipment on Wet or Dry Ice |
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Number of Markers | 10 |
Product Type | Protein Ladder |
Molecular Weight (g/mol) | 260, 140, 100, 70, 50, 40, 35, 25, 15, 10 kDa |
Ready to Load | Yes |
Stain Type | 4 colors: Blue, Orange, Green, Pink |
Size Range | 10 to 260 kDa |
Gel Compatibility | Bolt™ Bis-Tris Plus Gels, Novex™ Tricine Gels, Novex™ Tris-Glycine Gels, NuPAGE™ Bis-Tris Gels, NuPAGE™ Tris-Acetate Gels, SDS-PAGE Gels |
Product Line | Spectra™ |
Detection Method | Colorimetric, NIR Fluorescence (700 nm), RGB Fluorescence (555 nm) |
Thermo Scientific™ PageRuler™ Unstained Low Range Protein Ladder
Thermo Scientific PageRuler Unstained Low Range Protein Ladder is a mixture of eight purified proteins and peptides (3.4 to 100 kDa) for use as size standards in peptide and small-protein gel electrophoresis.

Number of Markers | 8 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 100, 30, 25, 20, 15, 10, 5, 3.4 kDa |
Ready to Load | Yes |
Stain Type | Unstained |
System Type | SDS-PAGE |
Size Range | 3.4 to 100 kDa |
Product Line | PageRuler™ |
Thermo Scientific™ Pierce™ Unstained Protein MW Marker
A mixture of seven native proteins (14.4kDa to 116kDa) for use as size standards in protein electrophoresis (SDS-PAGE).

Thermo Scientific™ Spectra™ Multicolor Low Range Protein Ladder
A mixture of six proteins and synthetic peptides (1.7 to 40kDa) for use as size standards for peptides and small proteins in gel electrophoresis and Western blotting.

Cytiva Protein and Peptide Molecular Weight Markers
Run these markers to determine the molecular weight of uncharacterized protein samples with precision. Cytiva Life Sciences™ Protein and Peptide Molecular Weight Markers work by comparing unknowns with carefully selected standards.

Form | Solid |
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Quantity | 10 Vials |
Storage Requirements | Unopened vials should be stored at 4°C |
Shelf Life | 2 Years |
Thermo Scientific™ PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa
Thermo Scientific™ PageRuler Plus Prestained Protein Ladder is a mixture of nine (9) blue-, orange- and green-stained proteins (10 to 250 kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and Western blotting.
Shipping Condition | Approved for shipment on Wet or Dry Ice |
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Number of Markers | 9 |
Product Type | Protein Ladder |
Molecular Weight (g/mol) | 250, 130, 100, 70, 55, 35, 25, 15, 10 kDa |
Ready to Load | Yes |
Stain Type | 3 colors: Blue, Orange, Green |
Size Range | 10 to 250 kDa |
Gel Compatibility | Bolt™ Bis-Tris Plus Gels, Novex™ Tricine Gels, Novex™ Tris-Glycine Gels, NuPAGE™ Bis-Tris Gels, NuPAGE™ Tris-Acetate Gels, SDS-PAGE Gels |
Product Line | PageRuler™ |
Detection Method | Colorimetric, NIR Fluorescence (700 nm), RGB Fluorescence (555 nm) |
Thermo Scientific™ PageRuler™ Prestained Protein Ladder, 10 to 180 kDa
Thermo Scientific PageRuler Prestained Protein Ladder is a mixture of 10 blue-, orange-, and green-stained proteins (10 to 180 kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and western blotting.
Shipping Condition | Approved for shipment on Wet or Dry Ice |
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Number of Markers | 10 |
Product Type | Protein Ladder |
Molecular Weight (g/mol) | 180, 130, 100, 70, 55, 40, 35, 25, 15, 10 kDa |
Ready to Load | Yes |
Stain Type | 3 colors: Blue, Orange, Green |
Size Range | 10 to 180 kDa |
Gel Compatibility | Bolt™ Bis-Tris Plus Gels, Novex™ Tricine Gels, Novex™ Tris-Glycine Gels, NuPAGE™ Bis-Tris Gels, NuPAGE™ Tris-Acetate Gels, SDS-PAGE Gels |
Product Line | PageRuler™ |
Detection Method | Colorimetric, NIR Fluorescence (700 nm), RGB Fluorescence (555 nm) |
Thermo Scientific™ PageRuler™ Prestained NIR Protein Ladder
A mixture of 10 proteins (11 to 250KDa) that are blue-stained and fluor-labeled for near-IR fluorescent visualization and protein sizing following electrophoresis.
Number of Markers | 10 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 250, 130, 95, 70, 55, 43, 34, 26, 15, 11 kDa |
Ready to Load | Yes |
Stain Type | 1 color: Blue |
Size Range | 11 to 250 kDa |
Product Line | PageRuler™ |
Detection Method | Colorimetric, NIR Fluorescence (700 nm) |
Thermo Scientific™ SuperSignal™ Enhanced Molecular Weight Protein Ladder
Ready-to-use mix of recombinant proteins (20 to 150K) with IgG-binding sites for chemiluminescent, fluorescent, chromogenic or other detection methods.
Number of Markers | 8 |
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Product Type | Protein Ladder |
Molecular Weight (g/mol) | 150, 100, 80, 60, 50, 40, 30, 20 kDa |
Ready to Load | Yes |
Stain Type | Unstained |
Size Range | 20 to 150 kDa |
Product Line | SuperSignal™ |
Detection Method | User defined detection system |
Thermo Scientific™ SuperSignal™ Molecular Weight Protein Ladder
Ready-to-use mix of recombinant proteins (20 to 150K) with IgG-binding sites for chemiluminescent, fluorescent, chromogenic or other detection methods.
Thermo Scientific™ PageRuler™ Unstained High Range Protein Ladder
A mixture of 8 unstained proteins (60 to 250kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and Western blotting.