摘要:
A method of making botulinum toxin comprises treating a culture of a botulinum toxin-producing strain with acid to precipitate a botulinum toxin; adding buffer to the precipitated botulinum toxin, followed by treatment with a protease inhibitor and nuclease, thereby extracting the botulinum toxin; treating the extracted botulinum toxin with acid to precipitate the botulinum toxin and dissolving the precipitate in buffer; and purifying the botulinum toxin by anion exchange chromatography. The use of the method makes it possible to produce a high-purity botulinum toxin by a simple process. The botulinum toxin produced by the method has high purity, and thus has an increased ability to act in a local area. Thus, the systemic circulation of the botulinum toxin is reduced to increase the safety. Accordingly, the botulinum toxin can be used for treatment of neuromuscular disorders, removal of wrinkles, and treatment of spastic hemiplegia and cerebral palsy.
摘要:
The present invention provides a method for efficiently producing a ³-glutamyl-valyl-glycine crystal. Specifically, the present invention provides a method for producing a ³-glutamyl-valyl-glycine crystal, which includes the steps of: preparing a mixed solution of valyl-glycine or a salt thereof and ³-glutamyl-valyl-glycine, wherein the mixed solution contains valyl-glycine or the salt thereof in an amount of 20 mass% or more relative to the mass of ³-glutamyl-valyl-glycine; adjusting the amount of valyl-glycine or the salt thereof in the prepared mixed solution to 0.1 mass% or more and less than 20 mass% relative to the mass of ³-glutamyl-valyl-glycine to prepare a ³-glutamyl-valyl-glycine solution; and subjecting the ³-glutamyl-valyl-glycine solution to a crystallization procedure to produce the ³-glutamyl-valyl-glycine crystal.
摘要:
The present invention relates to a method for purifying triple-helical or collagen-like proteins recombinantly produced from a bacterial, yeast or plant host cell.
摘要:
Methods for the improved purification of antibodies and other proteins from protein preparations including the steps of conditioning the protein preparation by contacting it with multivalent organic ions, then applying the conditioned preparation to an adsorptive chromatography medium.
摘要:
A method of purifying a desired protein from a preparation includes (a) providing the preparation in a form having less than about 5% of chromatin residing in an original production medium, (b) contacting the preparation with a nonionic organic polymer and a salt, a concentration of nonionic organic polymer being sufficient to precipitate the desired protein or cause its accretion on a hydrophilic surface, or maintain it in a precipitated state or accreted on the hydrophilic surface, the salt concentration being sufficient to produce greater than physiological conductivity, and (c) contacting the preparation with at least one electropositive surface, optionally in the presence of a salt concentration sufficient to produce greater than physiological conductivity, the desired protein does not substantially adsorb to the at least one electropositive surface while not preventing adsorption of acidic contaminants to the at least one electropositive surface.
摘要:
The present invention relates generally to a method of purifying proteins. More specifically, the present inventions relates to a method of purifying haptoglobin and hemopexin from the same starting material, and uses thereof.
摘要:
The invention relates to soluble selenium compositions and methods of production, separation and purification thereof. In particular the present invention provides methods of preparing water soluble selenoglycoproteins (e.g., via extracting selenoglycoproteins from selenium enriched yeast), methods of supplementing a selenium deficient composition via admixing water soluble selenoglycoproteins with the selenium deficient composition, compositions comprising the water soluble selenoglycoproteins and methods of administering the same.