摘要:
A method of purifying a polypeptide having a physiological activity such as one having interferon activities from a culture mixture of a microorganism obtained by a recombinant DNA technique and capable of producing the polypeptide is disclosed. The method comprises subjecting the cultured cells to extraction and purification in the presence of a salt of zinc or copper and polyethyleneimine thereby inhibiting decomposition and denaturation of the polypeptide. The extracted polypeptide can be further purified by column chromatographies using a column containing an anion exchange resin, column containing a cation exchange resin and column containing a gel filtration resin.
摘要:
A process is disclosed for purifying gamma interferon from various contaminants resulting from disruption of the cell in which the interferon was produced. The process provides for sequential removal of (a) nucleic acids, (b) negatively charged contaminating proteins, (c) positively charged contaminating proteins and (d) low and high molecular weight impurities.
摘要:
This invention provides a crystalline form of recombinant human granulocyte-macrophage colony-stimulating factor (r-h-GM-CSF) and methods for making such crystals.
摘要:
This invention provides a crystalline form of recombinant human granulocyte-macrophage colony-stimulating factor (r-h-GM-CSF) and methods for making such crystals.
摘要:
Antagonists of GM-CSF are disclosed that comprise antibodies and anti-idiotypic antibodies specific for the carboxyl terminus of GM-CSF. These antagonists are useful for treating various diseases, the symptoms of which are increased by GM-CSF, and for lessening the effects of chemotherapy.
摘要:
A method of purifying granulocyte-macrophage colony-stimulating factor (GM-CSF), particularly recombinant human GM-CSF, in good yield and with retention of biological activity, comprising sequential anion-exchange, dye-ligand affinity, gel filtration and reversed-phase chromatography is disclosed.
摘要:
A process for crystallizing recombinant human interleukin 4 (rhulL-4) from a solution containing a sulfate or citrate salt is described. The crystalline form is suitable for x-ray diffraction and has wide applications in several pharmaceutical processes including purification, formulation and manufacturing.
摘要:
Biologically active oxidized variants of granulocyte-macrophage colony stimulating factor (GM-CSF) are provided in which one or more methionine residues are oxidized. Methods are also provided for making and characterizing such variants.