Table 2. SAXS-derived hydrodynamic parameters.

	Rg (Å)	Dmax (Å)	Porod's volume (Å3)	Estimated MW (kDa)	Theoretical MW (kDa)
WT-APO	45.1±0.2	158	401.504	241	228 (Tetramer)
WT-GMP	44.0±0.3	154	367.818	220
WT-GDP	49.7±0.2	159	807.586	485	456 (Octamer)
WT-GTP	49.6±0.3	163	790.699	475
ΔBateman-APO	38.2±0.2	128	288.670	173	176 (Tetramer)
ΔBateman-GMP	36.8±0.4	121	298.568	179

MW, molecular weight; SAXS, small angle X-ray scattering.

Hydrodynamic parameters estimated from the SAXS data in the presence or absence of 5 mM guanine nucleotides. Rg values are given with s.e.