E. Quantification of last 10 seconds of fluorescence recovery (90-100 seconds) in B and D. Bars represent mean ± SEM. Statistical significance was calculated according to the Mann-Whitney U test. N = 12, 11 and 11 spines for EGFP-GSK3α baseline, cLTD and washout groups and 20, 11 and 9 spines for EGFP-GSK3β baseline, cLTD and washout groups, respectively. 