Patent ID: 7745410

Claim:
An isolated peptide that targets bladder tumor cells, which comprises an amino acid sequence represented by the formula: Cys Xaa Asn Xaa Asp Xaa Arg Xaa Cys (SEQ ID NO: 7); wherein, the second amino acid (Xaa) is selected from the group consisting of serine (S), proline (P), alanine (A) and valine (V); the fourth amino acid (Xaa) is selected from the group consisting of arginine (R), glycine (G), lysine (K), glutamine (Q), asparagine (N) and leucine (L); the sixth amino acid (Xaa) is selected from the group consisting of alanine (A), glutamic acid (E), valine (V), serine (S), glutamine (Q) and threonine (T); and the eighth amino acid (Xaa) is selected from the group consisting of arginine (R), asparagine (N) and leucine (L).