Fig. 11. Representative Western blots (  A ) of NMDA receptor NR1 phosphorylation status at serine 896 (protein kinase C site) and serine 897 (protein kinase A site) in homogenates from slices obtained from animals of different ages. The intensity of bands relative to the control samples are shown in  B . Con = control, normally oxygenated slices; Isof = 1% isoflurane in normally oxygenated media for 20 min; Isof/OGD and I/O = a combination of isoflurane 1% and OGD for 20 min; OGD = oxygen and glucose deprivation for 20 min. Protein loading controls for these samples are shown in  figure 7 .