Bycontrast, the matrix metalloproteinase gene MMP9, whichwas upregulated, is activated, according to ANDSystem, by five proteins (MEIN1, PPIA, TRIB3, CHK1, FEN1), theexpression of which was also increased in tumor hepatocytes.In addition, CDC20, FEN1, KLF5, and their target genesshowed increased expression. The gene discussed is FEN1; the disease is neoplasm.