Schematic outline of the expression comparisons and stress experiments. A. Samples of non-stressed animals were compared to those of stressed animals (sacrificed either 4 h or 8 h later). Two mouse strains were used (C57BL/6J and DBA/2J). A comparison of basal expression was also included. B. C57BL/6J and DBA/2J mice were subjected to 5 min forced swimming (FS) either at 8:00 or at 12:00, and sacrificed 4 h (Stressed-4 h) or 8 h (Stressed-8 h) later at 16:00. Control mice were sacrificed at 16:00 without having been stressed (Non Stressed).