PPP1R13B, also known as apoptosis-stimulating proteins of the p53 (ASPP1), is a member of the newly discovered ASPP family that exerts its cancer-inhibiting effects mainly by promoting p53-mediated apoptosis (36) and is downregulated in the lung (37), kidney (38), and colon (39) cancers. This evidence concerns the gene PPP1R13B and cancer.