Protein Molecular Weight Markers

Protein Molecular Weight Markers
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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) |
Invitrogen™ iBright™ Prestained Protein Ladder
For visualization and protein sizing during Electrophoresis and confirmation of Western blot detection.

Shipping Condition | Dry Ice |
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Content And Storage | Storage buffer: 62.5 mM Tris-H3PO4 (pH 7.5 at 25°C), 1 mM EDTA, 2% (w/v) SDS, 10 mM DTT, 1 mM NaN3 and 33% glycerol Upon receipt, store at –20°C. Product is shipped on ice. |
Number of Markers | 12 |
Product Type | Protein Ladder |
Molecular Weight (g/mol) | 250, 130, 95, 80, 70, 55, 43, 34, 30, 26, 15, 11 kDa |
Ready to Load | Yes |
Stain Type | 1 color: Blue |
Size Range | 11 to 250 kDa |
Gel Compatibility | Novex™ Midi Gels, Novex™ Mini Gels, Novex™Tris-Glycine Gels, NuPAGE™ Bis-Tris Gels, NuPAGE™ Gels, NuPAGE™ MES Gels, NuPAGE™ MOPS Gels, NuPAGE™ Tris-Acetate Gels, Precise™ Tris-Glycine Gels, SDS-PAGE Gels, Precise™ Tris-HEPES Gels |
Product Line | iBright™ |
Invitrogen™ Mark12™ Unstained Standard
Allows the closest estimation of molecular weight of your sample protein over a wide molecular weight range

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) |
Invitrogen™ Novex™ Sharp Pre-stained Protein Standard
Designed for accurate, easy, and convenient molecular weight estimation of a wide range of molecular weight proteins during SDS-PAGE and Western blotting

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) |
Cytiva Rainbow™ Molecular Weight Markers
Monitor progress of protein electrophoresis and assess transfer efficiency and molecular weight of blotted proteins without staining. Cytiva Life Sciences™ Rainbow™ Molecular Weight Markers use bright, distinctive colors to allow easier confirmation of transfer to blotting membranes and orientation.

Description | Rainbow molecular weight markers enhanced to enable faster and simpler identification of proteins on SDS-polyacrylamide gels. |
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Form | Liquid |
Product Type | Protein Molecular Weight Marker/Ladder |
Color | Multi |
Sufficient For | 50 Minigels or 25 large gels |
Quantity | 250 μL |
Storage Requirements | -15 to -30°C |
Shelf Life | 24 Months |
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) |
Invitrogen™ SeeBlue™ Plus2 Pre-stained Protein Standard
Allows you to easily visualize protein molecular weight ranges during electrophoresis and quickly evaluate Western transfer efficiency
Proteintech Prestained Protein Marker
The PL00001 Regular Range Protein Marker is a ready to use three-color protein standard with 10 prestained proteins covering a wide range of molecular weights from 10 to 180 kDa.
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™ |
Invitrogen™ NativeMark™ Unstained Protein Standard
Ready-to-use protein standard designed for molecular weight estimation of proteins using native gel electrophoresis

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™ Unstained Protein MW Marker
A mixture of seven native proteins (14.4kDa to 116kDa) for use as size standards in protein electrophoresis (SDS-PAGE).

Invitrogen™ MagicMark™ XP Western Protein Standard
Specifically designed for easy and convenient protein molecular weight estimation directly on Western blots

Shipping Condition | Dry Ice |
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Number of Markers | 9 |
Molecular Weight (g/mol) | 220, 120, 100, 80, 60, 50, 40, 30, 20 kDa |
Ready to Load | Yes |
Stain Type | Unstained |
System Type | Western Blotting, SDS-PAGE |
Size Range | 20 to 220 kDa |
Product Line | MagicMark™ |
Detection Method | User defined detection system |