A. Effects of 70% nitrous oxide on caspase-3 activation. Each band in the Western blot represents an independent experiment. B. Quantification of Western blot, normalized to β-actin levels. We have averaged results from three independent experiments. C. Effects of the nitrous oxide treatment on apoptosis. We have averaged results from six independent experiments. D. Effects of the nitrous oxide treatment on BACE levels. Each band in the Western blot represents an independent experiment. E. Quantification of the Western blot, normalized to β-actin levels. We have averaged results from three independent experiments. F. Effects of the nitrous oxide treatment on Aβ levels. We have averaged results from six independent experiments. BACE, β-site amyloid precursor protein-cleaving enzyme; APP, amyloid precursor protein; Aβ, β-amyloid protein; FL, full length. N.S., not significant; ** P <0.01