A Sample exploration times of wild type mice after chABC or Pnase treatment (left panel) and object preference on the choice phase after chABC or Pnase treatment (right panel, 1 min and 3 h delay: chABC n = 7, Pnase n = 8; 24 h and 48 h delay: chABC n = 8, Pnase n = 9). B Object recognition with a 24 h delay 3,6 and 8 weeks after chABC or Pnase treatment (chABC: n = 5; Pnase: n = 5). Data are presented as mean +/− sem, * simple main effect, p < 0.05.