Patent ID: 6919424

Claim:
A polypeptide having the ability to bind CEA comprising the amino acid sequence: (SEQ ID NO:110) Cys-X 4 -X 5 -X 6 -X 7 -X 8 -X 9 -X 10 -X 11 -Cys, wherein: X 4 is Asn, Glu, Asp, or Met; X 5 is Leu, Phe, Tyr, Trp, Val, Met, Ile, or Asn; X 6 is Phe, Leu, Asp, Glu, Ala, Ile, Lys, Asn, Ser, Val, Trp, Tyr, Gly, or Thr; X 7 is Lys, Phe, Asp, Gly, Leu, Asn, Trp, Ala, Gln, or Thr; X 8 is Asn, Pro, Phe, Gly, Asp, Ala, Ser, Glu, Gln, Trp, His, Arg, Met, Val, or Leu; X 9 is Gln, Lys, Leu, or Gly; X 10 is Trp, Ala, or Tyr; and X 11 is Phe, Thr, Met, Ser, Ala, Asn, Val, His, Ile, Pro, Trp, Tyr, Gly, Leu, or Glu.