Shop All Protein Standards & Ladders

Mark12™ Unstained Standard (Invitrogen™)

Mark12 Unstained Standard consists of 12 polypeptides in the range of 2.5–200 kDa. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Accurate protein sizing on SDS-polyacrylamide gels and western blots

PageRuler™ Unstained Broad Range Protein Ladder (Thermo Scientific™)

Thermo Scientific PageRuler Unstained Broad Range Protein Ladder is a mixture of 11 proteins (5 to 250 kDa) for use as size standards in protein electrophoresis (SDS-PAGE) and western blotting. The protein ladder is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Product features
• Reference bands—the 100, 50, and 20 kDa bands are more intense for easy orientation
• Tagged— each protein in the contains an integral Strep-tag™ II sequence and can be detected on western blots using Strep-Tactin™ conjugates or an antibody against Strep-tag™ II sequence

Applications
• Accurate protein sizing on SDS-polyacrylamide gels and western blots

NativeMark™ Unstained Protein Standard (Invitrogen™)

NativeMark Unstained Protein Standard is a ready-to-use protein standard of eight protein bands in the range of 20–1,200 kDa, designed for molecular weight estimation of proteins using native gel electrophoresis. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Sizing estimation of proteins separated on native-polyacrylamide gels and western blots

Pierce™ Prestained Protein MW Marker (Thermo Scientific™)

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). The protein standards are supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Component proteins: beta-galactosidase (120 kDa), bovine serum albumin (85 kDa), ovalbumin (50 kDa), cardonic anhydrase (35 kDa), beta-lactoglobulin (25 kDa), and lysozyme (20 kDa)

Applications
• Monitoring protein migration during SDS-polyacrylamide gel electrophoresis.
• Monitoring protein transfer onto membranes after western blotting
• Sizing of proteins on SDS-polyacrylamide gels and western blots

E-PAGE™ SeeBlue™ Pre-stained Standard (Invitrogen™)

E-PAGE SeeBlue Pre-stained Standards are designed for use with the pre-cast E-PAGE Electrophoresis System. The standards consist of three blue-dyed and two colored bands ranging in size from ~21–261 kDa for monitoring gel and transfer runs. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Monitoring protein migration during SDS-polyacrylamide gel electrophoresis
• Monitoring protein transfer onto membranes after western blotting
• Sizing of proteins on E-PAGE gels and western blots

Protein Molecular Weight Standards (broad range) (Invitrogen™)

The broad range protein molecular standards include 11 proteins from 6500 to 205,000 daltons for use as molecular weight standards in SDS-polyacrylamide gel electrophoresis.

SeeBlue™ Plus2 Pre-stained Protein Standard (Invitrogen™)

SeeBlue Plus2 Pre-Stained Standard contains 10 proteins (4–250 kDa): 8 blue-dyed and 2 with contrasting colors, for easy and quick evaluation of electrophoresis and western transfer efficiency. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Monitoring protein migration during SDS-polyacrylamide gel electrophoresis
• Monitoring protein transfer onto membranes after western blotting
• Sizing of proteins on SDS-PAGE gels and western blots

SeeBlue™ Pre-stained Protein Standard (Invitrogen™)

SeeBlue Pre-Stained Standard consists of nine polypeptides that resolve into sharp, tight blue bands in the range of 4–250 kDa allowing you to easily monitor protein electrophoresis and western transfer efficiency. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Monitoring protein migration during SDS-polyacrylamide gel electrophoresis.
• Monitoring protein transfer onto membranes after western blotting
• Sizing of proteins on SDS-polyacrylamide gels and western blots

Spectra™ Multicolor Low Range Protein Ladder (Thermo Scientific™)

Thermo Scientific Spectra Multicolor Low Range Protein Ladder is a mixture of six proteins and synthetic peptides (1.7 to 40 kDa) for use as size standards for peptides and small proteins in gel electrophoresis and western blotting. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Monitoring of protein migration during SDS-PAGE
• Verifying western transfer efficiency
• Approximate sizing of proteins on SDS-polyacrylamide gels and western blots
• Locating a protein of interest for excision from an unstained preparative gel

BenchMark™ Pre-stained Protein Ladder (Invitrogen™)

BenchMark Pre-Stained Protein Ladder contains 10 proteins ranging in apparent molecular weight from 6 to 180 kDa for use in monitoring electrophoresis or transfer from gel to membrane in western blotting. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Monitoring protein migration during SDS-polyacrylamide gel electrophoresis
• Monitoring protein transfer onto membranes after western blotting
• Sizing of proteins on SDS-PAGE gels and western blots

BenchMark™ Protein Ladder (Invitrogen™)

BenchMark Protein Ladder consists of 15 unstained recombinant proteins ranging in molecular weight from 10 to 220 kDa. The protein standard is supplied in a ready-to-use format for direct loading onto gels; no need to heat, reduce, or add sample buffer prior to use.

Compare and view all other protein standards and ladders ›

Applications
• Sizing of proteins on SDS-polyacrylamide gels and western blots