Corrigendum: Synaptic Ribbon Active Zones in Cone Photoreceptors Operate Independently From One Another

A Corrigendum on
Synaptic Ribbon Active Zones in Cone Photoreceptors Operate Independently from One Another

by Grassmeyer, J. J., and Thoreson, W. B. (2017). Front. Cell. Neurosci. 11:198. doi: 10.3389/fncel.2017.00198

In the original article, there was a mistake in Figure 6D as published. The ordinate was not corrected for liquid junction potential. The corrected Figure 6 appears below.

FIGURE 6

Figure 6. Ribbon-to-ribbon Ca²⁺ activation is more variable than cone-to-cone I_Ca activation. (A) I_Ca in one cone with R_ser completely compensated. I_Ca was normalized to its peak value and plotted against the cone holding potential during the voltage ramp protocol (gray trace). A Boltzmann function adjusted for driving force was fit to these data (black line, V₅₀ = −39.3, slope factor = 4.88). Inward currents are plotted upward to compare more easily with Ca²⁺ signal measurements. For this illustration, currents were digitally corrected for the passive membrane resistance measured in the range from −85 mV to −70 mV. (B) Overlaid Boltzmann function fits to normalized I_Ca from the 28 cones in which ribbon Ca²⁺ signals in Panel (C) were measured. (C) Overlaid Boltzmann function fits to ribbon-associated Ca²⁺ signals of 47 ribbons in the 28 cones shown in Panel (B). Ribbons were analyzed as illustrated in Figure 1. (D) Distribution of V₅₀ values calculated from Boltzmann function fits to I_Ca (average = −38.1 ± 3.0 mV) and optical ribbon Ca²⁺ measurements made with OGB-5N (average = −34.8 ± 3.5 mV). Bars show the mean ± SD.

The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.