Cover legend: Transverse section through the spinal cord and dorsal nerve root of a 14-d-old, Schwann cell-depleted mouse, showing the presence of CNS-type glia in the nerve roots. Oligodendrocytes are labeled with antibodies against Olig2 (green) and astrocytes are labeled with antibodies against GFAP (red). Nuclei were counterstained with Hoechst 33342 (blue). For more information, see the article by Coulpier et al. in this issue (pages 5958–5967).