TABLE 2.

SAXS structural parameters

Parameter	Value(s) for UL11-StII
Guinier analysis
I(0) (cm−1)a	0.00477 ± 0.000041
Rg (Å)b	24.29 ± 2.0
qmin (Å−1)c	0.01254
qRg maxd	1.30239
Coefficient of correlation, R2e	0.938
P(r) analysis (forced to 0/not forced)f
I(0) (cm−1)	0.004748 ± 0.00003566/0.004866 ± 0.00009504
Rg (Å)	24.74 ± 0.1599/26.29 ± 1.712
Dmax (Å)g	76/120
q range (Å−1)h	0.0074 − 0.2802/0.0074 − 0.2802
χ2 (total estimate from GNOM)i	1.0385 (0.8640)/0.9935 (0.7203)
AMBIMETER analysis of P(r) (forced to 0/not forced)f
Compatible shape categoriesj	720/153
Ambiguity scorek	2.857/2.185
Uniquenessl	Highly ambiguous/might be ambiguous

^aI(0), scattering intensity at zero angle.

^bR_g, radius of gyration.

^cq_min, lowest q value used in the Guinier analysis.

^dqR_g max, maximum q value used in the Guinier analysis × R_g.

^eR², linear fit of the Guinier plot.

^f(forced to 0/not forced) = P(r) forced to 0 at D_max in DATGNOM (91)/P(r) not forced to 0.

^gD_max, maximum dimension calculated from P(r).

^hq range, q values used in P(r) plot.

ⁱχ² fit of P(r) to data. The total quality estimate from GNOM (91) is shown in the parentheses.

^jThe number of shape topologies, M, compatible with P(r) evaluated by AMBIMETER (94).

^kThe ambiguity score is log M and correlates with probability of finding a false-positive result in a three-dimensional (3D) reconstruction (94).

^lUniqueness of 3D reconstruction of P(r) evaluated by AMBIMETER (94).