Figure 2From: System in biology leading to cell pathology: stable protein-protein interactions after covalent modifications by small molecules or in transgenic cellsMEF cell line, BID -/-: activation of PARP and caspase 3 in the presence of 10 μM of xanthurenic acid: upper photos the cells without xanthurenic acid and bottom photos with 10 μM of xanthurenic acid: left (upper-down) detection of PARP, right (upper-down) detection of caspase-3.Back to article page