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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: Curr Protoc Protein Sci. 2012 Nov;CHAPTER:Unit17.14. doi: 10.1002/0471140864.ps1714s70

Figure 6.

Figure 6

Regularized Fourier transforms of the SAXS data using the program GNOM (Svergun, 1992) to obtain the P(r) distribution and the associated maximum dimension of the particle, dmax. The red curve corresponds to the correct dmax=46Å, the pink to the underestimated dmax=38Å, and the green to the overestimated dmax=60Å. Note the negative tail of the P(r) distribution for dmax=60Å and the abrupt drop to zero for dmax=38Å. Panel (A) shows the fits of the SAXS data with the Fourier transforms of the three P(r) distributions shown in panel (B). Insets show the expanded view of the high-q data fits in panel (A) and the long-distance tails of the P(r) distributions in panel (B).