Regeneration
The price of Protein A affinity chromatography resins is many times the cost of non-affinity supports. Accordingly Protein A resins are typically recyled by treatment with strong chaotropic solutions (urea…
Methods of coupling
See also multimers of SpA In General and Definitions Cross-Link: is a bond that links one polymer chain to another. They can be covalent or ionic bonds. Many different types of coupling…
Ligands, Linkers and Immobilization, Generally
See Linkers for Affinity Chromatography Types of Linkers: Flexible Linkers: Flexible linkers are usually applied when the joined domains require a certain deree of movement of interaction. They are generally…
Resins
See also Analogues of Protein A (e.g., variants of Protein A which can be attached to the various types of resins below). Definitions Cross-Link: is a bond that links one polymer chain to…
elution
Elution by Change from Neutral to Acidic pH Elution of the target molecule form the Protein A column generaly requires drastic conditions, a step gradient to 0.1M Glycine-HCL (pH<3.1) is…
Parameters
Operating Conditions for the Binding/washing/elution Binding: (i) pH: It is known that binding of mouse IgG to protein A-Sepharose is pH sensitive and that optimum adsorption occurs using 0.1M sodium phosphate,…
Temperature sensitive mutants
Commercially available Temperature Response Protein A resins: Nomadic Byzen Pro In General Koguma (US13/996385; see also US application No. 14/408,458) discloses antibody purification using a temperature responsive protein A medium…
Multimers of Protein A
See also how to attach Multi-domain ligands to the resin Berg (WO2006/065208) discloses a matrix to which antibody binding protein ligands such as Protein A, G and/or L have been immobilised.…
Analogues of Protein A
See also structure of the SpA (i.e., various domains) See also Multimers of SpA One of the problems with proteinaceous affinity ligands in large scale purification is their sensitivity to alkaline conditions.…