NRP2 and neoplasm: tLyP-1 peptide (amino acid sequence: CGNKRTR) The tLyp-1 peptide is a heptapeptide that selectively targets neuropilin-1 (NRP1) and neuropilin-2 (NRP2), receptors highly expressed in various tumor tissues, including non-small cell lung cancer (NSCLC), playing critical roles in cancer drug delivery systems [222].