Import rates calculated from fits to the recovery time courses. R16-V13P ( k I = 1.64 ± 0.04 ks −1 , n = 276); V13P-R16 ( k I = 1.72 ± 0.04 ks −1 , n = 154); R16-WT ( k I = 1.42 ± 0.04 ks −1 , n = 192); WT-R16 ( k I = 1.29 ± 0.04 ks −1 , n = 260); R16-Y9P ( k I = 1.58 ± 0.07 ks −1 , n = 80); Y9P-R16 ( k I = 1.02 ± 0.08 ks −1 , n = 55). Significance levels for two-tailed the Mann–Whitney non-parametric test: NS , P > 0.05; * P < 0.05; ** P < 0.01; **** P < 0.0001. R16-V13P versus V13P-R16, P = 0.06; R16-WT versus WT-R16, P = 0.02; R16-Y9P versus Y9P-R16, P = 1.67 × 10 −6 .
