FoXS Server: Fast X-ray Scattering

Fast SAXS Profile Computation with Debye Formula

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Type PDB code of input molecule or upload files in PDB format (zip file with several PDBs can be uploaded):

Input molecule:		(PDB:chainId e.g. 6lyz:A) or upload file:
Experimental profile:		(optional) sample input
e-mail address:		(optional, the results are sent to this address)
Job name:		(optional)

Advanced Options

Maximal q value
Profile size		number of points in the computed profile
Hydration layer		use hydration layer to improve fitting
	fix hydration layer density		values between -1.0 and 4.0 are acceptable
Excluded volume adjustment		adjust the protein excluded volume to improve fitting
	fix excluded volume		values between 0.95 and 1.05 are acceptable
Implicit hydrogens		implicitly consider hydrogen atoms
Residue level computation		perform coarse grained profile computation for Cα atoms only
Background adjustment		adjust the background of the experimental profile
Offset		use offset in profile fitting
MODEL reading		determine how to read PDB files with MODEL records
Experimental profile units		determine the units of q in the experimental profile

NEW! Now with conformational sampling and multi-state modeling, try here

If you use FoXS, please cite:

Schneidman-Duhovny D, Hammel M, Tainer JA, and Sali A. Accurate SAXS profile computation and its assessment by contrast variation experiments. Biophysical Journal 2013. 105 (4), 962-974
Schneidman-Duhovny D, Hammel M, Tainer JA, and Sali A. FoXS, FoXSDock and MultiFoXS: Single-state and multi-state structural modeling of proteins and their complexes based on SAXS profiles NAR 2016 [ FREE Full Text ]

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