The present invention relates to the screening method of antagonistic
material of integrin using the protein chip and useful peptides screened
thereby. The protein chip used in the present invention is unique
substrate coated with new material, calixarene derivative, which can keep
uniform and high activities of proteins. Integrin receptor protein is
arrayed high densely on the chip, and materials (protein, peptide, small
molecules and so on) specifically inhibiting the binding of ligand can be
screened therewith. The integrins used in the present invention are
integrin av f3 3 and integrin a1, b j3 3, and new antagonistic peptides
screened from peptide library have high binding affinity.