BSN and Anxiety: Similarly, in the light–dark test for anxiety-like behavior, Bsn cKO and WT mice spent comparable time periods in the illuminated compartment (Fig. 3c; WT: 44.54 ± 2.49%; Bsn cKO: 47.41 ± 1.98; U = 53.50, p = 0.6923, Mann–Whitney U test).