Figure 4.
A rod contact and cone contacts with GFP-labeled type 7 bipolar dendrites (green) in the (mGluR6+/+) GUS-GFP mouse retina. A–C, A CtBP2-labeled ribbon (red) in a rod spherule (RS) lies singly and spans three optical sections (∼1.3 μm in total thickness). A single dendritic process (white arrow) ascends toward the RS and appears to make contact with the ribbon (white arrowhead). B–D, CtBP2-labeled ribbons (red) in cone pedicles (CPs) are relatively small and aligned in clusters. Two dendrites (yellow arrows) branch out in close apposition to ribbons (yellow arrowheads) in CPs.