The present invention relates to a peptide or peptide complex binding to α2 integrin, to one or more nucleic acid(s) coding for the peptide or peptide complex, a recombinant cell producing the peptide or peptide complex, a method for producing the peptide or peptide complex, a pharmaceutical composition comprising the peptide or peptide complex or the nucleic acid(s) for use as a medicament, a method for detecting α2 integrin and a screening method.本發明係關於與α2整合素結合之胜肽或胜肽複合物、一或多種編碼此胜肽或胜肽複合物之核酸、製造此胜肽或胜肽複合物之方法、包含此胜肽或胜肽複合物或核酸之醫藥組成物用作為醫藥品、偵測整合素之方法及篩選方法。