Abstract:
A micro titre plate comprising a number of wells filled with separation matrix. According to the invention the volume of the separation matrix is varied between at least some of the wells.
Abstract:
A chromatography system (1 ) for separation of a biopolymer is described, comprising at least one feed tank (3), at least one hold tank (4; 4a, 4b, 4c), at least one elution buffer tank (5), at least one eluate tank (6), at least two packed bed chromatography columns (7,8) and for each packed bed chromatography column (7,8) at least one pump 810) and at least one outlet detector (11) both connected to said each packed bed chromatography column (7,8), wherein the feed tank, the hold tank(s), the elution buffer tank and the eluate tank are each connected to the packed bed chromatography columns via a system of valves (12), and wherein said hold tank(s) is/are connected to at least one inlet end (13) of a column (7,8) and at least one outlet end (14) of a column (7,8).
Abstract:
The present invention relates to a liquid mixture comprising a first polymer, which is a poly(acid), a second polymer, which is a poly(ether), and at least one salt, wherein the molecular weight of the poly(acid) is in the range of 1000-100,000 Da. The second polymer is selected to be capable of forming immiscible aqueous phases in the presence of the poly(acid) and salt. The poly(acid) may be selected from the group consisting of poly(acrylic acid) and poly(methacrylic acid), and the second synthetic polymer may comprise ethylene oxide. The invention may be used for separation of biomolecules, cells or particles.
Abstract:
The present invention relates to methods of isolating biomolecules. More particularly, the invention relates to methods for isolating antibodies (mAbs) and related proteinsincluding antibody fragments (Fabs) under conditions where they are positive and relatively hydrophobic and will react with negatively charged polymer to form polymer-protein complexes which precipitate. The isolation can be accomplished usinginexpensive and biocompatible negatively charged polymers such as polyacrylic acid or carboxymethyldextran polymers of various molecular weights as precipitant.Itoccurs at relatively high concentrations of polymer (e.g. 10%) and high salt concentration (>50mM) and conductivity (e.g. >10 mS/cm) over wide range of pH.
Abstract:
The present invention relates to a process of isolating one or more target compounds, wherein the clarification of feed is performed using partitioning in a multiphase system comprising a first polymer, which is a synthetic poly(acid), a second synthetic polymer, which is a poly(ether), and at least one salt, which clarification is followed by at least one step of affinity chromatography. The molecular weight of the poly(acid) may be in the range of 1000-100,000 Da. The target compound is preferably a biomolecule, such as a monoclonal antibody.
Abstract:
The present invention relates to a simulated moving bed process, wherein at least one adsorbent is washed after binding of target compound and wherein the outlet of wash liquid from said adsorbent is subsequently passed onto another adsorbent for binding of target compound removed by said washing. In one embodiment, the method comprises binding of at least one target compound using three or more adsorbents connected in series and elution of target compound from said three adsorbents. After the binding to an adsorbent, wash liquid is passed across said adsorbent to recover desorbed and/or unbound target compound, and the outlet of such wash liquid is directed to the adsorbent after the next in the series, to which no feed has yet been added. The target compound is recovered by eluting target compound from the washed adsorbents.
Abstract:
A chromatography system with a main column (1) comprising a chromatography resin, a first guard column (2) and a second guard column (3), wherein the first guard column (2) is connected to a first end of the main column (4), the second guard column (3) is connected to a second end (5) of the main column and the bed volumes of said first and second guard columns are each less than about 50% of the bed volume of the main column.
Abstract:
A method for determining binding capacities of a chromatography column (1; 39, 47, 59; 107, 109, 111, 113), comprising: - detecting a feed signal (21; 201) representative of the composition of a feed material provided to the inlet of the column; - detecting an effluent signal (23; 203, 205, 207, 209) representative of the composition of the effluent from the column; - using the feed signal and the effluent signal to determine binding capacities of the column. And a method for controlling a chromatography system comprising at least one column, comprising the steps of: - determining binding capacities of the at least one chromatography column according to above; and - controlling the start and stop of the different chromatography process steps according to the determined binding capacities.
Abstract:
The invention relates to an aqueous two phase extraction (ATPE) augmented precipitation process, which may be used to recover and also partially purify therapeutic proteins, including monoclonal antibodies from a crude multi-component mixture. The process involves the formation of a forward extraction PEG-Phosphate ATPE system in which the target product is preferentially partitioned to the polymer rich phase. A second ATPE back extraction system is then formed by introducing the polymer rich phase from the forward extraction to a new phosphate salt rich phase, causing the product to precipitate at the interface between the two phases. This precipitate is then recovered and resolubilised in a suitable buffer and may be passed on for further purification.