Polypeptides are disclosed having an
amino acid sequence at least 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% identical to the
amino acid sequence selected from SEQ ID NO: 1-28, not including any
amino acid insertions at identified
insertion sites, wherein the polypeptide binds to the F 1 domain of
insulin receptor; or SEQ ID NO: 29-31, wherein the polypeptide binds to the LI domain of
insulin receptor; fusion proteins thereof, and. methods for their use.