Table 1.

Estimation of stored energy in bound importin-β complexes according to an equilibrium elongation of 13 nm and a spring constant of 8 × 10⁻³ N/m, as derived from equilibrium and stretching simulations of yImpβ

PDB id	Organism	Cargo	Elongation	Stored energy	Reference
1QGK	Human	Importin-α	8.9 nm	∼41 kJ/mol	(21)
2P8Q	Human	Snurportin1	8.5 nm	∼48 kJ/mol	(48)
2BKU	Yeast	RanGTP	8.9 nm	∼40 kJ/mol	(22)
1UKL	Mouse	SREBP-2	10.5 nm	∼15 kJ/mol	(49)