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Purification of Platelets from Mouse Blood
Published on: May 7, 2019
Human platelet factor 4: Purification and characterization by affinity chromatography. Purification of human platelet
The Journal of Biological Chemistry
|January 25, 1976
Summary
Platelet factor 4, an antiheparin protein, can be rapidly purified using affinity chromatography. This method utilizes its heparin-binding properties for efficient isolation from platelet concentrates.
Area of Science:
- Biochemistry
- Hematology
Background:
- Platelet factor 4 (PF4) is a protein found in platelet granules.
- PF4 exhibits potent antiheparin activity in vitro.
- Its properties allow for effective purification strategies.
Purpose of the Study:
- To develop a rapid and simple purification method for Platelet factor 4.
- To utilize PF4's antiheparin property for affinity chromatography.
Main Methods:
- Affinity chromatography using heparin epsilon-aminocaproic acid Sepharose.
- Purification from outdated platelet concentrate supernatants or platelet extracts.
- Precipitation with ammonium sulfate, dialysis, and elution with a NaCl gradient.
Main Results:
- A single protein peak with high PF4 activity was obtained.
- Purified PF4 showed a single band on SDS-PAGE.
- Molecular weight determined by SDS-PAGE was approximately 11,600 Da.
Conclusions:
- Affinity chromatography on heparin Sepharose is an effective method for PF4 purification.
- The developed procedure is rapid, simple, and yields highly pure PF4.
- PF4's antiheparin activity is key to its purification via this method.
