For example, in the previous experiments with human lung epithelial Calu-3 cells, mouse neuroblastoma Neuro2a cells, mouse pancreatic β Min6 cells, and human aortic endothelial cells, the cells were incubated with MPO for 1 h prior to the addition of GO to initiate the formation of H2O2 [20]. The gene discussed is MPO; the disease is neuroblastoma.