To further determine the apoptotic mechanism of CRC cells by the A. camphorata mycelium constituent, antrodin C, the levels of cell-death-related proteins, including Bcl-2, Bax, cleaved caspase-3, cleaved caspase-9, and TNFα, were measured in antrodin-C-treated HCT-116 cells using Western blotting. Here, CASP9 is linked to colorectal carcinoma.