We successfully identified a heptapeptide (P7) by phage display technique, which not only specifically binds to heat shock protein 90 (Hsp90) overexpressed on the cell surface [148], but also reduces the intracellular Hsp90 level in non-small cell lung cancer (NSCLC) cells [149]. Here, HSP90AA1 is linked to non-small cell lung carcinoma.