(A-K) Co-labeling of Sox10 with Sox9 (A-B'), AP2α (C-D'), Jun (E-F') and Yy1 (I-J'), and co-labeling of Sox9 and Oct6 (G-H') in transverse sections through the E18.5 trunk. Low magnification merged images of protein of interest (red) and Sox10 (green) (A,C,E,I) or Sox9 (G). High magnification images of the DRG, showing merged images of the protein of interest (red) and Sox10 (or Sox9) in green (B,D,F,H,J), and single protein of interest images in white (B',D',F',H',J'). Blue is DAPI counterstain in A-I. Arrows indicate co-expression of proteins of interest with Sox10 (or Sox9) in late immature and pro-myelinating SCs. Quantification of percentage of Sox10+ cells that co-express each of the proteins of interest (K). Error bars = S.E.M. drg, dorsal root ganglion; sc, spinal cord; sn, spinal nerve; vr, ventral root. Scale bars, 60μm.