| abstract |
The present invention provides collections of polypeptides, where each polypeptide includes a region Xaa n , wherein n is from about 5 to about 21, and each Xaa is independently a random amino acid. Polynucleotides encoding the polypeptides, are also provided, as are methods for identifying a polypeptide within a collection that prevents cell death after exposure to a pathogen or a toxin, and methods for identifying a polypeptide within a collection that binds a pathogen, a toxin, a polypeptide, or a polynucleotide. The present invention also provides methods for crystallizing a polypeptide. |