Recombinant Human PGK-1 Protein, CF

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R&D Systems Recombinant Proteins and Enzymes
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Product Details

Recombinant Human PGK-1 Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Measured by NADH production in a reaction coupled with GAPDH. The specific activity, as measured under the described conditions, is >50,000 pmol/min/μg.
Spodoptera frugiperda, Sf 21 (baculovirus)-derived human PGK1 protein
Met1-Ile417, with an C-terminal 10-His tag
Accession #
N-terminal Sequence
No results obtained
Predicted Molecular Mass
46 kDa
42 kDa, reducing conditions

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Supplied as a 0.2 μm filtered solution in Tris, NaCl and Glycerol.
Shipping The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -70 °C as supplied.
  • 3 months, -70 °C under sterile conditions after opening.

Assay Procedure

  • Assay Diluent: deionized water
  • Recombinant Human PGK1 (rhPGK1) (Catalog # 5455-PK)
  • 50 mM KH2PO4, pH 7.0
  • 100 mM MgSO4 in deionized water
  • 1.0 M Glycine in deionized water
  • 50 mM DL-Glyceraldehyde 3-Phosphate (GAP) (Sigma, Catalog # G5251) in deionized water
  • 10 mM beta -Nicotinamide adenine dinucleotide ( beta -NAD) (Sigma, Catalog # N6522). Prepare 200 mM stock in deionized water
  • 10 mM Adenosine 5’-Diphosphate (ADP) (Sigma, Catalog # A2754). Prepare 200 mM stock in deionized water. Note: ADP degrades to AMP which is an inhibitor of rhPGK1. Be sure to aliquot and store the stock at ≤-20 °C. Prepare fresh when necessary.
  • 0.25 µg/µL Glyceraldehyde 3-Phosphate Dehydrogenase (GAPDH) (Sigma, Catalog # G5537) in 50% Glycerol
  • UV Plate, 96 well (Costar, Catalog # 3635)
  • Plate Reader (Model: SpectraMax Plus by Molecular Devices) or equivalent
  1. Prepare substrate buffer by mixing the following (prepare fresh):
    1. 100 µL 50 mM KH2PO4, pH 7.0
    2. 20 µL 50 mM GAP
    3. 30 µL 10 mM beta -NAD
    4. 20 µL 10 mM ADP
    5. 50 µL 100 mM MgSO4
    6. 100 µL 1 M Glycine
    7. 20 µL 0.25 µg/µL GAPDH
    8. 160 µL deionized water

    9. Note: This amount will assay nine wells. If more volume is needed, multiply each component’s volume by the same number to get the desired amount.
  2. Dilute rhPGK1 to 0.02 ng/µL in deionized water.
  3. Load in a 96 well UV plate 50 µL of the substrate buffer, and start the reaction by adding 50 µL of 0.02 ng/µL rhPGK1. Include a blank containing 50 µL of the substrate buffer and 50 µL deionized water.
  4. Read at 339 nm in kinetic mode for 5 minutes.
  5. Calculate specific activity:

     Specific Activity (pmol/min/µg) =

Adjusted Vmax* (OD/min) x well volume (L) x 1012 pmol/M
ext. coeff** (M-1cm-1) x path corr.*** (cm) x amount of enzyme (µg)

     *Adjusted for Substrate Blank

     **Using the extinction coefficient 6220 M-1cm-1

     ***Using the path correction 0.32 cm

     Note: the output of many spectrophotometers is in mOD

Per Well:
  • rhPGK1: 0.001 μg
  • Rxn mix: 5 mM KH2PO4, pH 7.0, 1 mM GAP, 0.3 mM beta -NAD, 0.2 mM ADP, 5 mM MgSO4, 100 mM Glycine, 5 ng/µL GAPDH
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: PGK1

Phosphoglycerate kinase-1 (PGK-1) is a glycolytic enzyme that catalyzes the conversion of 1,3-diphosphoglycerate to 3 phosphoglycerate. The gene encoding PGK-1 is X-linked. Mutations of this gene may cause phosphoglycerate kinase deficiency, which is characterized by hemolytic anemia, muscle stiffness and mental retardation (1‑3). PGK 1 is induced by oxidative stress through the induction of hypoxia-inducible factor 1a and is a potential biomarker and therapeutic target for cancer (4‑7).

  1. Beutler, E. (2002) Br. J. Haematol. 136:3.
  2. Flanagan, J.M. et al. (2006) Br. J. Haematol. 134:233.
  3. Svaasand, E.K. et al. (2007) Muscle Nerve. 36:579.
  4. Hwang, T.L. et al. (2006) Proteomics. 6:2259.
  5. Wang, J. et al. (2007) Cancer Res. 67:149.
  6. Zieker, D. et al. (2008) Cell Physiol. Biochem. 21:429.
  7. Jang, C.H. et al. (2008) Biosci. Biotechnol. Biochem. 72:1799.
Long Name
Phosphoglycerate Kinase-1
Entrez Gene IDs
5230 (Human); 18655 (Mouse); 24644 (Rat)
Alternate Names
Cell migration-inducing gene 10 protein; EC; MGC142128; MGC8947; MIG10; PGK1; PGKA; PGKAMGC117307; phosphoglycerate kinase 1; Primer recognition protein 2; PRP 2; PRP2


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