Protein Standard

Protein Standard


A protein standard, also known as a protein ladder or molecular weight marker, is a mixture of proteins of known sizes used as a reference in gel electrophoresis experiments. Protein standards are essential tools for estimating the size of unknown proteins and for determining the molecular weight of protein samples separated on gels.

Here's how protein standards are used in gel electrophoresis experiments:

Size Determination: Protein standards consist of a mixture of proteins with known molecular weights, typically ranging from a few kilodaltons (kDa) to several hundred kilodaltons. These proteins are run alongside the protein samples of interest on a gel during electrophoresis.

Molecular Weight Calibration: By comparing the migration distances (or migration rates) of the protein standards to the migration distances of the protein samples, researchers can estimate the molecular weight of the unknown proteins. This is achieved by plotting a standard curve with the known molecular weights of the protein standards against their migration distances.

Normalization: Protein standards are also used for normalizing gel-to-gel variability and assessing the efficiency of protein transfer in techniques such as Western blotting. Including a protein standard lane on each gel allows researchers to compare protein band intensities across different gels and experiments.

Quality Control: Protein standards serve as quality control measures to ensure the proper functioning of electrophoresis equipment and reagents. They allow researchers to verify the resolution and accuracy of protein separation and to identify any issues with gel integrity or experimental conditions.

Protein standards are available in various forms, including pre-stained or unstained, colored or colorless, and ready-to-use or concentrated formats. They may also include a mixture of proteins with different fluorescent or colorimetric labels to facilitate detection and visualization on gels.

Commonly used protein standards include:

  • Benchtop Molecular Weight Markers: These are mixtures of proteins with known molecular weights that can be run on standard polyacrylamide gels.
  • Pre-stained Protein Ladders: These protein standards are pre-stained with dyes for visualization on gels without additional staining steps.
  • Fluorescent Protein Ladders: These protein standards are labeled with fluorescent dyes for detection and quantification using fluorescence imaging systems.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Purified GFP

    Purified GFP | AG45-0205-Z

    100

    $1,218.00
    Purified GFP | AG45-0205-Z | Gentaur Species Reactivity: GFP Format: Unconjugated AP Product Type: Protein Standard Source: E.coli
    100-AG45-0205-Z
    $1,218.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,218.00
    Subtotal:
  • Plasmodium falciparum

    Plasmodium falciparum | AG55-0092-Z

    100

    $1,435.00
    Plasmodium falciparum | AG55-0092-Z | Gentaur Species Reactivity: HRP2 Format: Unconjugated AP Product Type: Protein Standard Source: E.coli
    100-AG55-0092-Z
    $1,435.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,435.00
    Subtotal:
  • Canine Heartworm Antigen

    Canine Heartworm Antigen | RA-40HRT

    100

    $2,096.50
    Canine Heartworm Antigen | RA-40HRT | Gentaur Species Reactivity: CHW Format: Extract Product Type: Protein Standard Source: Native
    100-RA-40HRT
    $2,096.50
    Qty in Cart: 0
    Quantity:
    Price:
    $2,096.50
    Subtotal:
  • FIPV N

    FIPV N | AG20-0344-Z

    100

    $1,806.00
    FIPV N | AG20-0344-Z | Gentaur Species Reactivity: FIPVN Format: Unconjugated AP Product Type: Protein Standard Source: E.coli
    100-AG20-0344-Z
    $1,806.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,806.00
    Subtotal:
  • FeLV

    FeLV | AG20-0281-Z

    100

    $1,806.00
    FeLV | AG20-0281-Z | Gentaur Species Reactivity: p27 Format: Unconjugated AP Product Type: Protein Standard Source: E.coli
    100-AG20-0281-Z
    $1,806.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,806.00
    Subtotal:
  • Dengue NS1 Protein-Type 4

    Dengue NS1 Protein-Type 4 | AG55-0261-Z

    100

    $1,274.00
    Dengue NS1 Protein-Type 4 | AG55-0261-Z | Gentaur Species Reactivity: NS1 Format: Unconjugated AP Product Type: Protein Standard Source: HEK-293
    100-AG55-0261-Z
    $1,274.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,274.00
    Subtotal:
  • Dengue NS1 Protein-Type 3

    Dengue NS1 Protein-Type 3 | AG55-0260-Z

    100

    $1,274.00
    Dengue NS1 Protein-Type 3 | AG55-0260-Z | Gentaur Species Reactivity: NS1 Format: Unconjugated AP Product Type: Protein Standard Source: HEK-293
    100-AG55-0260-Z
    $1,274.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,274.00
    Subtotal:
  • Dengue NS1 Protein-Type 2

    Dengue NS1 Protein-Type 2 | AG55-0259-Z

    100

    $1,274.00
    Dengue NS1 Protein-Type 2 | AG55-0259-Z | Gentaur Species Reactivity: NS1 Format: Unconjugated AP Product Type: Protein Standard Source: HEK-293
    100-AG55-0259-Z
    $1,274.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,274.00
    Subtotal:
  • Dengue NS1 Protein-Type 1

    Dengue NS1 Protein-Type 1 | AG55-0258-Z

    100

    $1,274.00
    Dengue NS1 Protein-Type 1 | AG55-0258-Z | Gentaur Species Reactivity: NS1 Format: Unconjugated AP Product Type: Protein Standard Source: HEK-293
    100-AG55-0258-Z
    $1,274.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,274.00
    Subtotal:
  • Classical Swine Fever Virus E2 Protein

    Classical Swine Fever Virus E2 Protein | AG05-0313-Z

    100

    $1,435.00
    Classical Swine Fever Virus E2 Protein | AG05-0313-Z | Gentaur Species Reactivity: CSFV Format: Unconjugated AP Product Type: Protein Standard Source: E.coli
    100-AG05-0313-Z
    $1,435.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,435.00
    Subtotal:
  • Purified CHO PLBL2 Protein

    Purified CHO PLBL2 Protein | AG65-0365

    100

    $21,385.00
    Purified CHO PLBL2 Protein | AG65-0365 | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0365
    $21,385.00
    Qty in Cart: 0
    Quantity:
    Price:
    $21,385.00
    Subtotal:
  • Purified CHO PLBL2 Protein

    Purified CHO PLBL2 Protein | AG65-0365-Z

    100

    $2,863.00
    Purified CHO PLBL2 Protein | AG65-0365-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0365-Z
    $2,863.00
    Qty in Cart: 0
    Quantity:
    Price:
    $2,863.00
    Subtotal:
  • Purified CHO PLBL2 Protein

    Purified CHO PLBL2 Protein | AG65-0324

    100

    $21,385.00
    Purified CHO PLBL2 Protein | AG65-0324 | Gentaur Species Reactivity: CHO (3E7 cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0324
    $21,385.00
    Qty in Cart: 0
    Quantity:
    Price:
    $21,385.00
    Subtotal:
  • Purified CHO PLBL2 Protein

    Purified CHO PLBL2 Protein | AG65-0324-Z

    100

    $2,863.00
    Purified CHO PLBL2 Protein | AG65-0324-Z | Gentaur Species Reactivity: CHO (3E7 cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0324-Z
    $2,863.00
    Qty in Cart: 0
    Quantity:
    Price:
    $2,863.00
    Subtotal:
  • Purified CHO Nidogen-1 Protein

    Purified CHO Nidogen-1 Protein | AG65-0426-01-Z

    100

    $3,129.00
    Purified CHO Nidogen-1 Protein | AG65-0426-01-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0426-01-Z
    $3,129.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,129.00
    Subtotal:
  • Purified CHO MMP-19 Protein

    Purified CHO MMP-19 Protein | AG65-0424-01-Z

    100

    $3,129.00
    Purified CHO MMP-19 Protein | AG65-0424-01-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0424-01-Z
    $3,129.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,129.00
    Subtotal:
  • Purified CHO Legumain Protein

    Purified CHO Legumain Protein | AG65-0423-01-Z

    100

    $3,129.00
    Purified CHO Legumain Protein | AG65-0423-01-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0423-01-Z
    $3,129.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,129.00
    Subtotal:
  • Purified Human IL-6 Protein

    Purified Human IL-6 Protein | AG-80LK6-Z

    100

    $2,625.00
    Purified Human IL-6 Protein | AG-80LK6-Z | Gentaur Species Reactivity: Human Format: Unconjugated Product Type: Protein Standard Source: N/A
    100-AG-80LK6-Z
    $2,625.00
    Qty in Cart: 0
    Quantity:
    Price:
    $2,625.00
    Subtotal:
  • Purified CHO GSTp Protein

    Purified CHO GSTp Protein | AG65-0337

    100

    $21,385.00
    Purified CHO GSTp Protein | AG65-0337 | Gentaur Species Reactivity: CHO (S-cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0337
    $21,385.00
    Qty in Cart: 0
    Quantity:
    Price:
    $21,385.00
    Subtotal:
  • Purified CHO GSTp Protein

    Purified CHO GSTp Protein | AG65-0337-Z

    100

    $2,863.00
    Purified CHO GSTp Protein | AG65-0337-Z | Gentaur Species Reactivity: CHO (S-cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0337-Z
    $2,863.00
    Qty in Cart: 0
    Quantity:
    Price:
    $2,863.00
    Subtotal:
  • Purified Dog CRP - Recombinant

    Purified Dog CRP - Recombinant | AG-40CRP-REC

    100

    $4,980.50
    Purified Dog CRP - Recombinant | AG-40CRP-REC | Gentaur Species Reactivity: CHO Format: Unconjugated Product Type: Protein Standard Source: N/A
    100-AG-40CRP-REC
    $4,980.50
    Qty in Cart: 0
    Quantity:
    Price:
    $4,980.50
    Subtotal:
  • Purified Dog CRP

    Purified Dog CRP | AG-40CRP

    100

    $3,920.00
    Purified Dog CRP | AG-40CRP | Gentaur Species Reactivity: Dog Format: Unconjugated Product Type: Protein Standard Source: N/A
    100-AG-40CRP
    $3,920.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,920.00
    Subtotal:
  • Purified Bovine CRP- Recombinant

    Purified Bovine CRP- Recombinant | AG-10CRP

    100

    $4,980.50
    Purified Bovine CRP- Recombinant | AG-10CRP | Gentaur Species Reactivity: CHO Format: Unconjugated Product Type: Protein Standard Source: N/A
    100-AG-10CRP
    $4,980.50
    Qty in Cart: 0
    Quantity:
    Price:
    $4,980.50
    Subtotal:
  • Purified CHO Clusterin Protein

    Purified CHO Clusterin Protein | AG65-0075-01-Z

    100

    $3,129.00
    Purified CHO Clusterin Protein | AG65-0075-01-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0075-01-Z
    $3,129.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,129.00
    Subtotal:
  • Purified Beta 2-Microglobulin Protein

    Purified Beta 2-Microglobulin Protein | AG65-0041-01-Z

    100

    $3,129.00
    Purified Beta 2-Microglobulin Protein | AG65-0041-01-Z | Gentaur Species Reactivity: CHO (S cell line) Format: Unconjugated AP Product Type: Protein Standard Source: N/A
    100-AG65-0041-01-Z
    $3,129.00
    Qty in Cart: 0
    Quantity:
    Price:
    $3,129.00
    Subtotal:
  • Total: items /

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