abstract |
An isolated polypeptide comprises the amino acid sequence X5X6ESLQ ERX13QALYEYA X21RX23X24 (residues 5-24 of SEQ ID NO:1), wherein X5, X6, X13, X21, X23, and X24 are each independently selected from any amino acid. Fusion proteins and conjugates of the polypeptide, and methods of making and using the polypeptide, fusion protein, or conjugate are also disclosed. |