KLF4 negatively regulates the expression of inhibitor of apoptosis-stimulating protein of p53 (iASPP), podocalyxin-like 1 (PODXL) and serine/threonine kinase 33 (STK33), which all perform oncogenic functions in gastric cancer [87,88,89]. The gene discussed is PPP1R13L; the disease is gastric cancer.