Patent ID: 8044175

Claim:
A polypeptide or multimeric polypeptide comprising the amino acid sequence: Gly-X1-Cys-X2-Cys-X3-Gly-Pro-Pro-X4-Phe-X5-Cys-X6-Cys-X7-X8-X9-X10-Pro (SEQ ID NO:534), wherein X1 is Ser; X2 is His, Tyr or Asn; X3 is Ser or Gly; X4 is any amino acid other than Cys; X5 is Glu; X6 is Trp; X7 is Tyr; X8 is Gly, Asp, Ala, Glu or Ser; X9 is Thr or Ser; and X10 is Glu or Asp.