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. 2015 Oct 5;5:13967. doi: 10.1038/srep13967

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(a) Microcantilever coated with non-specific reference peptide (Ref-¹or Ref-²) shows no response to the presence of normal or cancer cells (no deflection). (b) Microcantilever functionalized with cancer targeting peptide (18-4 or cRGDfC) demonstrates a strong response (deflection) to cancerous cells due to peptide-cancer cell interactions. PSD, Position Sensitive Detector.