TABLE 3.

Data collection and scattering-derived parameters for SpPaaI SAXS data

	SpPaaI
Data collection parameters
Instrument	Pilatus 1 m
Beam geometry	250 × 150 μm
Wavelength (Å)	1.54
q range (Å−1)	0.01–0.5
Exposure time (s)	21.0
Concentration range (mg ml−1)	0.3 - 5
Temperature (C)	26
Structural parameters
I (0) (cm−1) (from P (r))	0.03
Rg (Å) (from P (r))	24.83
I (0) (cm−1) (from Guinier)	0.03
Rg (Å) (from Guinier)	24.93
Dmax (Å)	67
Porod volume estimate (Å3)	89, 294
Dry volume calculated from sequence (Å3)	18, 413
Molecular mass determination
Partial specific volume (cm3 g−1)	0.75
Molecular mass (Da) (from I (0))	63,000
Calculated monomeric molecular mass from sequence (Da)	60,000