| CPC G01N 33/54326 (2013.01) [G01N 33/531 (2013.01); G01N 33/54346 (2013.01); G01N 33/574 (2013.01); G01N 33/68 (2013.01); B82Y 5/00 (2013.01); B82Y 25/00 (2013.01); B82Y 40/00 (2013.01)] | 8 Claims |

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1. A magnetic nanoparticle comprising a specific targeting polypeptide, wherein the specific targeting polypeptide is a specific recognition polypeptide targeting an epithelial cell adhesion molecule, wherein the specific targeting polypeptide comprises an amino acid sequence as set forth in any one of SEQ ID NO:1-9.
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