Tests in the dark/light box revealed increased anxiety of GluR-BΔFB mice (latency of first exit: wild-type [17 s ± 3], GluR-BΔFB [97 s ± 42], p = 0.047; compartment changes: wild-type [17 s ± 3], GluR-BΔFB [7 ± 2], p < 0.05; time spent in lit compartment: wild-type [103 s ± 10], GluR-BΔFB [59 s ± 19], p = 0.051; each n = 6). The gene discussed is GSR; the disease is Anxiety.