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Purification of rabbit tumor necrosis factor
FEBS Letters
|January 28, 1985
Summary
Researchers purified rabbit tumor necrosis factor (TNF), a key inflammatory protein. This study details the successful isolation and characterization of TNF from rabbit serum, providing a foundation for further research into its biological functions.
Area of Science:
- Biochemistry
- Immunology
- Protein Chemistry
Background:
- Tumor necrosis factor (TNF) is a critical cytokine involved in inflammation and immune responses.
- Understanding the purification and characteristics of TNF from different species is essential for immunological research.
Purpose of the Study:
- To purify and characterize rabbit tumor necrosis factor (TNF).
- To determine the yield and specific activity of the purified rabbit TNF.
- To sequence the N-terminal amino acids of rabbit TNF.
Main Methods:
- Purification of TNF from rabbit serum using ammonium sulfate precipitation.
- Chromatographic techniques including DEAE-Sephadex, Sephacryl S-200, and Blue-Sepharose 6B.
- Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) for protein analysis.
- N-terminal amino acid sequencing.
Main Results:
- Rabbit TNF was purified to homogeneity, appearing as a single 18 kDa protein band on SDS-PAGE.
- The purification procedure yielded 22% of the protein with a specific activity of 2.4 X 10(7) U/mg.
- The N-terminal sequence of 20 amino acids was successfully determined.
Conclusions:
- A robust method for purifying rabbit TNF was established.
- The purified rabbit TNF exhibits high specific activity.
- The N-terminal sequence provides valuable information for understanding TNF structure-function relationships.