Figure 2.

Paranodal BK channels in rat Purkinje cells. A, Paranodal BK channel immunolabeling was detected only in a subset of Caspr-positive paranodes in the cerebellar white matter. Scale bar, 20 μm. B, Paranodal BK channels (red) were detected near the Purkinje cell soma. The axon is labeled using an antibody against unphosphorylated neurofilament H (green). Scale bar, 20 μm. C, Paranodal BK channel immunolabeling (red) found on parvalbumin (PV; blue)-positive axons in the white matter. Juxtaparanodes are immunolabeled using antibodies against Kv1.2 (green). Scale bar, 10 μm.