Co-variation of vesicular release rate and AP-evoked presynaptic Ca²⁺ fluorescence transients.

<p>Dependencies of AP-evoked SRC1 de-staining rate (A) and vesicular release rate (B) on the amplitude of AP-evoked presynaptic Ca²⁺ fluorescence <i>ΔF/F_m</i>, pooled data from six axons (<i>n</i> = 19 boutons). All parameters are normalized to the respective mean value in each experiment (axon), non-normalized data are presented in <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1001396#pbio-1001396-g001" target="_blank">Figures 1H</a> and <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1001396#pbio.1001396.s002" target="_blank">S2</a>. Correlation coefficients ρ and significance levels <i>p</i> (Spearman rank correlation test) are indicated. Dashed lines show data fits with a power function.