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Combinatorial surrobody libraries
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DOI：10.1073/pnas.0805293105.png)
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Abstract
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A unique type of combinatorial protein libraries has been constructed. These libraries are based on the pre-B cell receptor (pre-BCR). The pre-BCR is a protein that is produced during normal development of the antibody repertoire. Unlike that of canonical antibodies, the pre-BCR subunit is a trimer that is composed of an antibody heavy chain paired with two surrogate light chain (SLC) components. Combinatorial libraries based on these pre-BCR proteins in which diverse heavy chains are paired with a fixed SLC were expressed in mammalian, Escherichia coli, and phagemid systems. These libraries contain members that have nanomolar affinity for antigen. We term this type of antigen-binding protein a surrobody to distinguish it from the canonical antibody molecule.
Keywords:
antibody engineering
combinatorial antibody libraries
surrogate light chain
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