Patent ID: 8183055

Claim:
A peptide aptamer comprising: (A) at least one dodecapeptide having in the direction from N-terminus to C-terminus a sequence of: (i) four aliphatic amino acids selected from the group consisting of valine, isoleucine, leucine, alanine and glycine, (ii) two acid amino acids selected from the group consisting of aspartic acid and glutamic acid, (iii) one proline, (iv) one basic amino acid selected from the group consisting of arginine, lysine and histidine, (v) two acid amino acids selected from the group consisting of aspartic acid and glutamic acid, (vi) one alcohol amino acid selected from the group consisting of threonine and serine and (vii) one aromatic amino acid selected from the group consisting of tryptophan, tyrosine and phenylalanine; (B) at least one polypeptide; and optionally (C) one or more detectable marker(s), wherein the sequence of the dodecapeptide is according to SEQ ID NO:1 or wherein the detectable marker is selected from the group consisting of a fluorescent marker, a radioactive marker, His-tag, glutathione transferase (GST), Flag-tag, biotin, Ha-tag, Myc-tag and XPress-tag.