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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
An artificial protein L for the purification of immunoglobulins and fab fragments by affinity chromatography.
Journal of Chromatography. A 2005 Februrary 5
The development and characterization of an artificial protein L (PpL) for the affinity purification of antibodies is described. Ligand 8/7, which emerged as the lead from a de novo designed combinatorial library of ligands, inhibits the interaction of PpL with IgG and Fab by competitive ELISA and shows negligible binding to Fc. The ligand 8/7 adsorbent (Ka approximately 10(4) M(-1)) compared well with PpL in binding to immunoglobulins from different classes and sources and, in addition, bound to IgG1 with K and lambda isotypes (92% and 100% of loaded protein) and polyclonal IgG from sheep, cow, goat and chicken. These properties were also reflected in the efficient isolation of immunoglobulins from crude samples.
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