Engineering affinity ligands for macromolecules

Details Engineering affinity ligands for macromolecules Engineering affinity ligands for macromolecules

C - Chemistry, Metallurgy

07

K

C07K 2/00 (2006.01) C07K 1/22 (2006.01) C12N 15/10 (2006.01) C12N 15/63 (2006.01) C12Q 1/68 (2006.01) G01N 33/53 (2006.01) G01N 33/543 (2006.01)

Patent

CA 2245675

A method is disclosed for obtaining highly specific and tailored ligands suitable for purifying a particular product target or for eliminating particular target impurities in a feed stream. Engineered affinity ligands according to the invention will bind a target with high specificity at a preselected binding condition and release the target at a preselected elution condition. The ligands are isolated by contacting a target with a multiplicity of polypeptides derived through variegation of the structure of a candidate binding domain, the variants (or analogues) including polypeptides favoring binding to the target under desired binding conditions and release from the target under elution conditions, where the binding and elution conditions differ according to one or more parameters, such as pH, temperature, concentration of salt or volume % of an organic solvent.

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