Impairment of regeneration after AraC treatment in Rbpj-mutant adult brain. A, Experimental design. B–Q, Coronal sections of the SVZ showing BrdU-incorporating cells soon after the removal of the osmotic pump (t = 0; B–I) and 10 d after the pump removal (t = 10; J–Q) in AraC-treated control (B–E, J–M) and AraC-treated Rbpj-mutant (F–I, N–Q) mice. R, Quantification of the number of BrdU-incorporating cells in the SVZ. BrdU was administered for 4 h before death.