Abstract: A novel method for selectively removing leaked protein A from antibody purified by means of protein A affinity chromatography is disclosed.

Abstract: In an affinity-type purification, ligands dissociated from a packed bed that would otherwise leach into the solution containing the species being purified are captured by a second ligand that resides in a porous barrier downstream from the packed bed, the second ligand exhibiting an affinity-type interaction with the dissociated first ligand with sufficient specificity to avoid the undesired retention by the second ligand of species from the liquid sample or source liquid other than the species sought to be purified in the affinity column.

Abstract: The present invention relates to the purification of polypeptides and the removal of endotoxin via immobilized metal affinity chromatography (IMAC). More specifically, the invention relates to methods for removing bacterial endotoxin in a protein solution. In specific embodiments, the invention relates to the elimination of endotoxin from Moraxella catarrhalis outer membrane proteins.

Abstract: The present invention provides a peptide capable of specifically binding to human IgG. In particular, the present invention relates to a human IgG binding peptide tag of 11 to 16 amino acids in length, comprising at least an amino acid sequence of the formula I: C-(X)n-W-X-X-X-W-(X)m-C (I) (SEQ ID NO: 17) wherein n and m are each an integer of 1 or more and the sum n+m is 4 or 5, wherein X-X-X in the formula I contains no cysteine residue, and wherein said amino acid sequence satisfies either or both of a) and b): a) (X)n—W in the formula I denotes Za-G-Y—W (SEQ ID NO: 18); and b) W—(X)m in the formula I denotes W-G-L-Zb (SEQ ID NO: 19) wherein Za and Zb are each 0, 1, or more amino acid residues.

Abstract: A cell extract for cell-free protein synthesis is produced by removing substances, which bind to an affinity support to be used in purification or interaction analysis, from a cell extract having protein synthetic activity. Then, a target protein is synthesized by using the cell extract for cell-free protein synthesis. The synthesized target protein can be purified by using the affinity support and used in interaction analysis.

Abstract: A protein containing one or more activatable groups, e.g., an antibody, is subjected to partial or complete reduction of one or more such bonds to form reactive groups; the resulting protein is reacted with a drug which is reactive with some of the reactive groups, such as certain radiometals, chelating agents, and toxins, so as to form a conjugate useful in, e.g., in vitro diagnosis, in vivo imaging, and therapy.

Abstract: The present invention provides a method for purifying a heat-resistant bio-nanocapsule composed mainly of a protein produced by using a eukaryotic cell. The method comprises heat-treating a lysate of the eukaryotic cell to remove contaminant proteins, and then subjecting the resulting product to chromatography.

Abstract: The invention provides a method for the separation and purification of two or three cellular components selected from genomic DNA, RNA and proteins from a single biological sample. The method comprises generating an aqueous solution containing the cellular components by lysing cells with a lysis solution; contacting the aqueous solution with an ion exchanger for genomic DNA and RNA to bind to the ion exchanger; collecting the flow-through which contains unbound proteins; eluting RNA from the ion exchanger; and eluting DNA from the ion exchanger. For the purification of any two of the cellular components, one of the components is not collected. The invention also provides reagent kits for carrying out the methods.

Abstract: The present invention relates to improved methods for protein purification of high-value heterologous proteins by providing fusion proteins suitable for affinity purification and improved and economical methods of proteolytic cleavage of fusion proteins. The methods are useful for large-scale production of purified recombinant proteins from plants, plant-derived tissue or plant cells. The invention aims to reduce the cost and improve the quality of downstream processing of heterologous proteins produced in plants and other biological production systems.

Abstract: Various system and method embodiments of the present invention are directed to separating target molecules from complex solutions by affinity column chromatography using organic-solvent-containing eluants. In one embodiment of the present invention, an eluant containing an organic-solvent is used, at a first pH, to remove non-target solutes and suspended entities from an affinity chromatography column. The pH of the eluant is then changed to a second pH, and the organic-solvent-containing eluant is used to elute target molecules from the affinity column chromatography.

Abstract: The present invention is a method for protein isolation as a co-product of alcohol production. The method includes receiving grain product at a holding receptacle, the grain product being at least one of whole stillage, dried distillers grain, and wet distillers grain. The method further includes directing the grain product from the holding receptacle over a plurality of screens, thereby allowing a fiber-containing portion of the grain product to be collected on the plurality of screens and further allowing a protein-containing portion of the grain product and an oil-containing portion of the grain product to pass through the plurality of screens.

Abstract: The present application provides methods of purifying A? binding proteins having a Fc region, for example, anti-A? antibodies or antibody fusions, by adsorbing the A? binding protein to a Fc binding agent, such as, for example, Protein A or Protein G, followed by a wash with a divalent cation salt buffer to remove impurities and subsequent recovery of the adsorbed A? binding protein. The present application also features methods of eluting the purified A? binding protein as well as the incorporation of the methods within a purification train. Kits comprising components for carrying out the methods and instructions for use are also provided.

Abstract: The invention relates to a process for the purification of IL-18 binding protein (IL-18BP) from a fluid comprising hydrophobic charge-induction chromatography.

Abstract: Methods are provided for purification of Factor VIII polypeptides by affinity chromatography and ion exchange chromatography, in which the eluate from the affinity column is diluted with a solution comprising higher salt concentration, or lower non-polar agent concentration than that of the elution solution, prior to passing the diluted solution through the ion exchange column. The affinity matrix may comprise a monoclonal antibody or a peptide ligand. The methods result in improved purification without significant yield loss.

Abstract: The present application provides methods of purifying polypeptides having a Fc region, for example, antibodies or antibody fusions, by adsorbing the polypeptides to a Fc binding agent, such as, for example, Protein A or Protein G, followed by a wash with a divalent cation salt buffer to remove impurities and subsequent recovery of the adsorbed polypeptides. The present application also features methods of eluting the purified polypeptide as well as the incorporation of the methods within a purification train. Kits comprising components for carrying out the methods and instructions for use are also provided.

Abstract: Featured are devices, methods and kits for preparation of samples of peptides and proteins from a solution; more particularly to such devices and methods in which carbon nanotubes are utilized for sample preparation and/or purification of peptide and/or protein samples from a solution. A sample to be treated/processed can comprise proteins, peptides or any other molecule having an amine moiety that can be protonated under low pH, such as, but not limited to, pH 5. Such a sample also can contain contaminants such as salts, detergents, etc. that will be eliminated during the sample preparation/purification process of the present invention. The methods, devices and kits of the present invention advantageously provide for the concentration of the sample, removal of contaminants and ease of manipulation of small liquids without the concomitant loss of sample.

Abstract: The present invention relates to processes for the purification of fibrinogen, and to readily solubilised fibrinogen preparations.

Abstract: Purification of vegetarian (non-animal derived) Protein A using a multidimensional purification process to remove undesirable non-animal derived component impurities in the Protein A from the non-animal fermentation media used to produce the Protein A so as to produce a vegetarian Protein A free of animal-origin components and essentially free of components derived from non-animal derived growth media.

Abstract: A process for manufacturing of a composition containing a purified factor for supporting wound healing selected from the group consisting of Hepatocyte Growth Factor (HGF) platelet derived growth factor (PDGF), Epidermal growth factor (EGF), transforming growth factor alfa (TGF-?), Transforming growth factor beta (TGF-?), insulin like growth factor (IGF-1) and Fibroblast growth factor (FGF) from sources, such as blood, containing the factor for supporting wound healing, wherein the manufacturing process comprises purification steps which are performed in the presence of antithrombin III (AT-III).

Abstract: A method for reducing leaching of protein A during protein A affinity chromatography is described which involves reducing temperature or pH of, or by adding one or more protease inhibitors to, a composition that is subjected to protein A affinity chromatography.

Abstract: This application relates to methods for the purification of saccharide antigen-carrier protein conjugates. In particular, the invention provides a method for purifying saccharide antigen- carrier protein conjugates from free carrier protein, such as CRM1 97, using hydroxyapatite. The invention further relates to methods of preparing vaccines, using this method.

Abstract: A porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer. Also disclosed is a porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer containing a biomolecule with a tag. A separate bioreactor is also disclosed incorporating the wafer described above.

Abstract: Methods for generating F(ab?)2 fragments from antibodies using thermolysin as well as F(ab?)2 fragments and compositions comprising F(ab?)2 fragments generated by the method are described.

Abstract: The present invention provides a method for purifying a protein to remove impurities from a mixture liquid containing a desired protein and the impurities, comprising the step of performing filtration using a porous membrane having a graft chain on a pore surface and an anion-exchange group fixed to the graft chain.

Abstract: The present invention relates to methods for identifying antigens from complex analyte samples. More specifically, the invention relates to methods for identifying antigens recognized by monoclonal antibodies in a complex analyte sample. The methods of this invention use a first affinity chromatography via a “multiaffinity” step and a second, “singleaffinity” step that implements parallel affinity chromatography.

Abstract: The invention provides a peptide triazole conjugate and derivatives thereof, and methods of its use.

Abstract: Provided is a process for purifying human interferon beta from a recombinant human interferon beta-containing culture comprising performing affinity chromatography and reversed-phase high-performance liquid chromatography (RP-HPLC), wherein the affinity chromatography includes: adsorbing the interferon beta-containing culture to an equilibrated affinity chromatography column, followed by washing with an equilibration buffer solution; washing the column with a washing buffer solution A of pH 6.5-7.5 containing 30-60 wt % of propylene glycol and a washing buffer solution B of pH 6.5-7.5 containing 10-30 wt % of propylene glycol and 1-2M NaCl; and eluting a human interferon beta-containing fraction with a buffer solution of pH 6.5-7.5 containing 40-60 wt % of propylene glycol and 1-2M NaCl.

Abstract: A process for isolation and purification of a target protein by chromatography wherein the chromatography removes or depletes prions (PrPSC), comprising the steps of contacting a potentially PrPSC contaminated sample comprising a target protein with a multimodal chromatographic material; setting buffer conditions so that the target protein is bound to the multimodal chromatographic material and whereas PrPSC is not binding to the multimodal chromatographic material; followed by elution of the target protein. a process for isolation and purification of a target protein free of prion protein (prpSC).

Abstract: A novel gene 024P4C12 (also designated 24P4C12) and its encoded protein, and variants thereof, are described wherein 24P4C12 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 24P4C12 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 24P4C12 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 24P4C12 can be used in active or passive immunization.

Abstract: The purpose of the invention is to provide a novel purification system allowing the efficient and economical production and purification of a recombinant fused protein, whereby the elution time at a low temperature can be reduced, since it has been a problem to be solved in the existing purification method using dockerin and cohesin. In this purification system, a dockerin polypeptide characterized in that the 14th amino acid in the subdomain 2 of dockerin originating from Clostridium josui is substituted with another amino acid, and a method for purification of a recombinant fused protein are provided.

Abstract: The invention provides extraction columns for the purification of an analyte (e.g., a biological macromolecule, such as a peptide, protein or nucleic acid) from a sample solution, as well as methods for making and using such columns. The columns typically include a bed of extraction media positioned in the column, often between two frits. In some embodiments, the extraction columns employ modified pipette tips as column bodies. In some embodiments, the extraction columns are comprised of frits having a low pore. In some embodiments, the frits of the extraction columns have a pore volume of less than one microliter or less than 10% of the interstitial volume of the bed of extraction media.

Abstract: The invention provides a method for purifying recombinant FSH.

Abstract: Processes and methods of purifying or separating Single Domain Antigen Binding (SDAB) molecules that include one or more single binding domains (e.g., one or more nanobody molecules), substantially devoid of a complementary antibody domain and an immunoglobulin constant region, using Protein A-based affinity chromatography, are disclosed.

Abstract: The present invention relates to a process for the purification of antibodies from one or more impurities in a liquid, which process comprises contacting said liquid with a first chromatography resin comprised of a support to which multi-modal ligands have been immobilised to adsorb the antibodies to the resin, wherein each multi-modal ligand comprises at least one cation-exchanging group and at least one aromatic or heteroaromatic ring system; adding an eluent to release the antibodies from the resin; and contacting the eluate so obtained with a second chromatography resin. In one embodiment, the ring-forming atoms of the aromatic or heteroaromatic entity are selected from the group consisting of C, S and O, and the cation exchanging group is a weak cation exchanger.

Abstract: The present invention encompasses a method for the production of Apolipoproteins in dimeric and/or oligomeric forms (comprising three or more units) of muteins of the human ApoA-1 protein in plant seeds, novel variants of these proteins having an increased stability and capacity to transport cholesterol compared to the native ApoA-1 protein, expression systems for the production thereof, plants transformed capable of producing said proteins in seeds in dimeric and/or oligomeric forms, and nutraceutical derivatives of these plants.

Abstract: The present invention provides improved methods and uses of an immunoglobulin in the purification of an interferon composition. The methods of the invention provide for the use of a monoclonal antibody in the purification of an interferon composition comprising a plurality of interferon alpha subtypes. The use of the monoclonal antibody provides for the production of an interferon composition with a consistent proportion of interferon subtypes, providing a resulting improvement in simplicity of production of the resulting interferon composition.

Abstract: The present invention relates to a novel method for the isolation or purification of immunoglobulins (a special class of proteins) from a solution containing immunoglobulins, e.g. hybridoma cell culture supernatants, animal plasma or sera, or colostrum. The method includes the use of a minimum of salts, such as lyotropic salts, in the binding process and preferably also the use of small amounts of organic solvents in the elution process. The solid phase matrices, preferably epichlorohydrin activated agarose matrices, are functionalised with mono- or bicyclic aromatic or heteroaromatic ligands (molecular weight: at the most 500 Dalton) which, preferably, comprises an acidic substituent, e.g. a carboxylic acid. The matrices utilised show excellent properties in a “Standard Immunoglobulin Binding Test” and in a “Monoclonal Antibody Array Binding Test” with respect to binding efficiency and purity, and are stable in 1M NaOH.

Abstract: Processes for the detection and purification of peptides and proteins comprising a metal ion-affinity peptide having a high affinity for coordinated metals and also being highly antigenic are described. Antibodies for use in the processes are also described.

Abstract: The invention relates to a method for purifying recombinant human FSH or an FSH variant starting from crude FSH, comprising the following steps: 1) dye-affinity chromatography; 2) hydrophobic interaction chromatography; and 3) reverse phase chromatography.

Abstract: High colicin producing bacteria strains are produced by introducing into a host cell multiple copies of a plasmid containing a colicin gene. A suitable host cell is a bacterium strain, Escherichia coli K-12 and examples of plasmids are pColE1-K53 or pColN-284.

Abstract: A method and system is provided for yielding biopharmaceutical products involving a chromatographic separation process. The method comprises: providing a plurality of membrane adsorber cartridges; providing a plurality of valves, communicatively coupled to said plurality of membrane adsorber cartridges; and switching the valves, so as to interconnect said membrane adsorber cartridges to operate in a countercurrent flow mode. The system comprises multiple membrane adsorber cartridges that are interconnected and configured to operate in a countercurrent flow mode. Furthermore, the configuration comprises a valve assembly that allows the cartridges to be subjected to different steps in the process by automatic switching of the valves. In this way, cartridges are recycled many times during the purification of a batch.

Abstract: Methods of producing properly refolded recombinant plasminogen and plasmin polypeptide are provided. Denatured recombinant plasminogen polypeptide is refolded by first solubilizing the polypeptide with a chaotroph and reducing and oxidizing agents at high pH, followed by refolding in the presence of reduced concentration of chaotroph and reducing and oxidizing agents and in the presence of arginine.

Abstract: High affinity antibodies for binding epitopes of BoNT/Aand hybridomas that produce such antibodies are described. The antibodies may be used in a kit for detecting BoNT/A in a sample.

Abstract: Disclosed herein are methods for the isolation and purification of antibodies wherein the use of an affinity chromatographic step results in an antibody composition sufficiently pure for pharmaceutical uses. The methods described herein comprise pH viral reduction/inactivation, ultrafiltration/diafiltration, affinity chromatography, preferably Protein A affinity, ion exchange chromatography, and hydrophobic chromatography. Further, the present invention is directed toward pharmaceutical compositions comprising one or more antibodies of the present invention.

Abstract: In a method of isolating osteogenic protein from bone, in which an osteogenic protein-containing fraction is extracted from bone and enriched by a sequence of enrichment steps selected from ultrafiltration and chromatography, the invention provides the improvement of removing higher molecular weight components from the osteogenic protein-containing fraction prior to the enrichment steps. The higher molecular weight components have a molecular weight of about 100-300 kDa and are selected from collagen, collagen fragments, collagen aggregates and mixtures thereof.

Abstract: An affinity matrix comprising a base matrix containing biotin; and a fusion protein attached to the base matrix, wherein the fusion protein contains a matrix binding element capable of binding to the base matrix via biotin and a target binding element capable of binding, or being bound by, at least one target component.

Abstract: Various system and method embodiments of the present invention are directed to separating target molecules from complex solutions by affinity column chromatography using organic-solvent-containing eluants. In one embodiment of the present invention, an eluant containing an organic-solvent is used, at a first pH, to remove non-target solutes and suspended entities from an affinity chromatography column. The pH of the eluant is then changed to a second pH, and the organic-solvent-containing eluant is used to elute target molecules from the affinity column chromatography.

Abstract: Uses of recombinant procalcitonin 3-116 in the diagnosis and therapy of septic diseases and the measurement of prohormones other than procalcitonin, and of dipeptidyl peptidase IV, as biomarkers in the diagnosis of sepsis.

Abstract: This invention relates to the application of hydrophobic interaction chromatography combination chromatography to the purification of antibody molecular proteins.

Abstract: This invention relates to the application of hydrophobic interaction chromatography combination chromatography to the purification of antibody molecule proteins.