Export and import kinetics of NTF2, α-lact and GFP. Presentation as in Fig. 5. Best fits yielded (A) k = 0.117 s−1, amplitude ratio A = 0.911 (NTF2 export), k = 0.0613 s−1, A = 0.931 (NTF2 import); (B) k = 6.96 × 10−3 s−1, A = 0.913 (α-lact export), k = 4.46 × 10−3 s−1, A = 1.09 (α-lact import); (C) k = 8.79 × 10−4 s−1, A = 0.911 (GFP export), k = 1.86 × 10−3 s−1, A = 0.832 (GFP import). Note the different timescales.