Synthetic antibodies from a four-amino-acid code: A dominant role for tyrosine in antigen recognition

Abstract excerpt

Antigen-binding fragments (Fabs) with synthetic antigen-binding sites were isolated from phage-displayed libraries with restricted complementarity-determining region (CDR) diversity. Libraries were constructed such that solvent-accessible CDR positions were randomized with a degenerate codon that encoded for only four amino acids (tyrosine, alanine, aspartate, and serine). Nonetheless, high-affinity Fabs (K(d) =...

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