Figure 4. Ribbon Densities of 4 OFF BC Types Are Unchanged across the Retina.

(A) Maximum intensity projections of confocal image stacks of isolated axon terminals and ribbons (Ribeye-ribeye-tagRFP) of four types of BCs at dorso-nasal (DN) and ventro-temporal (VT) locations.
(B) Quantification of ribbon density (mean ± SEM) per axon terminal at two retinal locations. Numbers indicate number of cells from 2–4 retinas.
(C) Scatterplot of ribbon number as a function of axon terminal volume. Solid lines represent linear regression lines. T1: β= 0.5209, p = 0.039, r2 = 0.2515; T2:β = 0.3761, p = 0.007, r2 = 0.4671; T3a: p = 0.534; b = 0.4256, p = 0.0112, r2 = 0.4078; T4: β= 0.3136, p < 0.001, r2 = 0.6865.
See also Figure S4.