Expression of CK1ε in subpopulations of the DRG neurons. (A-D) Immunofluorescent micrographs of L5 DRG sections labelled with CK1ε-IR (red) together with CGRP or IB4 (green) in sham- (A, C) and SNL- (B, D) operated C57BL/6J mice. (E, F) Confocal images of the spinal cord sections labeled with the antibody against CK1ε together with the antibody against CGRP. In the spinal cord, CK1ε (red) is partly colocalized with CGRP (green), a marker for primary afferents, in the superficial dorsal horn in sham- (E) and SNL- (F) operated mice. Scale bars, 20 μm.