Table 4.

Cell dimension expansion during irradiation with the specified electron fluence.

2D crystal	Cell	Fluence	Expansion			Expansion
		(e${}^{-}$/Å ${}^2$)	4K	13K	100K	(Å)
Paraffin	$a=$ 7.4 Å, $b=$ 5.0 Å	50	–	0.86 ± 0.1%	0.45 ± 0.2%	$\approx$ 0.04
	(P12${}_{\mathrm{1}}$)
Purple	$a=$ 62.5 Å	25	0.4 ± 0.1%	0.45 ± 0.2%	0.45 ± 0.1%	$\approx$ 0.25
membrane	(P3)
Aquaporin	$a=$ 69.0 Å	25	0.15 ± 0.15%	–	0.1 ± 0.1%	$\approx$ 0.12
AQP4	(P42${}_{\mathrm{1}}$2)