Panel 2 (P2) included human tumor cell lines known to express low levels of nectin4 (hN4-low), i.e., cells carrying no amplification or overexpression of nectin4, e.g., U-2-OS, HeLa, U-251, K-562, MDA-MB-231, PANC-1, and HPAC. The gene discussed is NECTIN4; the disease is neoplasm.