About OptiPrep™
OptiPrep™ is a high-purity sterile density gradient medium composed of 60% (w/v) iodixanol in water. It is extensively used in molecular biology, virology, and cell biology laboratories for density gradient ultracentrifugation, virus purification, extracellular vesicle isolation, and organelle separation.
Thanks to its iso-osmotic properties across a wide density range, OptiPrep™ provides superior preservation of biological activity compared with sucrose or cesium chloride gradients. The low toxicity and low viscosity of iodixanol make it particularly suitable for sensitive viral vectors, live cells, and extracellular vesicles.
Researchers commonly use OptiPrep™ for:
- AAV purification
- Lentivirus purification
- Adenovirus isolation
- Exosome and extracellular vesicle (EV) isolation
- Organelle fractionation
- Mitochondria isolation
- Cell fractionation
- Ultracentrifugation workflows
Why Use Iodixanol Instead of Sucrose or Cesium Chloride?
Compared with traditional density media such as sucrose or cesium chloride, OptiPrep™ offers several important advantages:
| Feature |
OptiPrep™ (Iodixanol) |
Sucrose |
Cesium Chloride |
| Iso-osmotic gradients |
Yes |
Limited |
No |
| Low toxicity |
Yes |
Moderate |
No |
| Preserves viral infectivity |
Excellent |
Moderate |
Poor |
| Compatible with live cells |
Yes |
Limited |
No |
| Low viscosity |
Yes |
No |
Yes |
Key Features
- High-purity OptiPrep™ iodixanol density gradient medium
- Iso-osmotic solutions across a broad density range
- Ideal for ultracentrifugation and density gradient separations
- Excellent resolution for virus, vesicle, and organelle purification
- Sterile filtered and produced under controlled conditions
Typical Applications of OptiPrep™ Density Gradients
The OptiPrep™ density gradient medium is widely used in many biological and biomedical applications, including:
- Virus purification and viral particle isolation
- Exosome and extracellular vesicle purification
- Organelle separation (mitochondria, nuclei, lysosomes)
- Cell fractionation and membrane isolation
- Lipoprotein and protein complex separation
Thanks to its iodixanol formulation, OptiPrep™ density gradients provide improved viability and structural preservation compared to traditional sucrose or cesium chloride gradients.
Why Use OptiPrep™ Iodixanol Gradients?
OptiPrep iodixanol solutions offer several advantages over conventional density gradient media. Because iodixanol forms iso-osmotic gradients, biological samples experience minimal osmotic stress during centrifugation. This property is particularly important when isolating delicate structures such as viruses, extracellular vesicles, or subcellular organelles.
The OptiPrep™ density gradient medium also allows precise control over density ranges, enabling researchers to optimize separation conditions for their specific samples.
OptiPrep Density Gradient for Advanced Research
OptiPrep™ has become a standard reagent for density gradient ultracentrifugation in virology, cell biology, and molecular biology laboratories. Its versatility and reproducibility make it suitable for both routine laboratory workflows and advanced research protocols.
By providing a reliable OptiPrep™ density gradient solution, researchers can achieve high-resolution separations while maintaining sample integrity.
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