| abstract |
The present invention is to provide a new detection method that is superior in detection sensitivity and allows a simple operation. A nucleic acid construct that includes a cloning region, an encoding nucleic acid of a peptide tag, an encoding nucleic acid of an aptamer that is bindable to the peptide tag is used. By inserting the encoding nucleic acid of arbitrary peptide into the cloning region of the nucleic acid construct, the nucleic acid construct is expressed in vivo. Thereby, a complex of a fusion transcript having the base sequence that includes the encoding nucleic acid of arbitrary peptide, the encoding nucleic acid of a peptide tag, and the encoding nucleic acid of the aptamer and a fusion translation that includes the arbitrary peptide and the peptide tag is formed. By bringing the complex into contact with a target and recovering the complex that is bound to the target, the peptide that is bindable to a target and its encoding nucleic acid can be identified from the transcript of the encoding nucleic acid of arbitrary peptide in the complex. |