Abstract:
The present invention provides novel and improved protein purification processes which incorporate certain types of carbonaceous materials and result in effective and selective removal of certain undesirable impurities without adversely effecting the yield of the desired protein product.
Abstract:
A method for removing retroviruses from liquid samples and a nanofiber containing liquid filtration medium that simultaneously exhibits high liquid permeability and high microorganism intention is disclosed. Retroviruses are removed from a liquid by passing the liquid through a porous nanofiber containing filtration medium having a retrovirus LRV greater than about 6, and the nanofiber(s) has a diameter from about 10 nm to about 100 nm. The filtration medium can be in the form of a fibrous electrospun polymeric nanofiber liquid filtration medium mat.
Abstract:
Novel compositions for removing impurities such as, protein aggregates, from a sample containing a protein of interest, e.g., an antibody. Such compositions can be used prior to the virus filtration step during protein purification, to remove aggregates and protect the virus filter from fouling, therefore improving virus filter capacity. A porous solid support including a co-polymer having at least two monomers, wherein at least one of the monomers comprises acrylamide and at least a second monomer comprises a hydrophobic binding group, where the solid support selectively binds protein aggregates, thereby to separate the monomeric protein of interest from the protein aggregates. The method can be performed under neutral to high pH and high conductivity conditions.
Abstract:
PROBLEM TO BE SOLVED: To provide novel compositions and methods for removal of protein aggregates from a sample in a flow-through mode.SOLUTION: A flow-through chromatography method of separating a monomeric protein of interest from protein aggregates in a sample includes a step of contacting the sample with a solid support comprising one or more cation exchange binding groups attached thereto, at a density of about 1 to about 30 mM, wherein the solid support selectively binds protein aggregates, thereby separating the monomeric protein of interest from protein aggregates.
Abstract:
PROBLEM TO BE SOLVED: To provide a medium which can purify viruses with high yield and purity.SOLUTION: The medium for chromatographic applications is a membrane having a surface coated with a polymer such as a polyethyleneimine. The immobilized polymer coating is modified with a charge-modifying agent to impart quaternary amine to the media. The medium are well suited for chromatographic purification of virus.
Abstract:
Un compuesto de membrana de ultrafiltración de agarosa que tiene un tamaño de poro inferior a 0,1 μm, en donde el compuesto comprende una membrana de soporte porosa que tiene una capa de agarosa sobre la membrana de soporte porosa, en donde la capa de agarosa comprende un grosor que varía de 1 a 100 μm, en donde la capa de agarosa se infiltra de 1 a 15 μm en al menos una porción del grosor de la membrana de soporte porosa y en donde la capa de agarosa se prepara a partir de una solución de agarosa que comprende cloruro de zinc para estabilizar la solución de agarosa a una concentración igual o menor al 15 % en peso y divinilsulfona (DVS) como reticulante al fundir una capa de la solución de agarosa sobre la membrana de soporte porosa y sumergir la membrana de soporte porosa recubierta de agarosa en un baño de agua a una temperatura por debajo del punto de gelificación de la solución de agarosa.