Thrombin as target molecule, and with the new bio-technique of phage display and biopanning, 3 special binding peptide clones were selected out from a phage-displayed random 15-peptide library. The sequence of the clone, which had the highest affinity with thrombin, has been determined. Data of ELISA showed that all the three clones could be combined to thrombin to some extent. And all of them could compete with hirudin, which is the natural inhibitor of thrombin.
Key words: phage display, random peptide library, biopanning, thrombin