Back

Run crysol in the ATSAS software package
[note: this Guide is for ATSAS 4.0.1 on mac - there may be minor differences between operation systems and ATSAS versions.]

• Go to the ATSAS download site, and download ATSAS (free for academic users and students. You need to make an user, but this is free and fast).
• Open Primus (should be in you app folder after installation). Primus is a GUI for ATSAS and has many great options.
• Load the data into Primus. Go to the Analysis tab. Press the bottom "Crysol Fit", select the data and press "Next".
• Press "Next" again (to use default parameters).
• Select PDB and press "Next".
• You will see a list of options. Use the default options, by pressing "Commit".
• Look at the output, here you can see important numbers: Chi-square, Adjusted contrast of the solvation shell (should be around 5% of the solvent density, which is 0.334 e/A^3 by default), and the Adjusted r0 (should be close to 1).
• Press "Next" to see the fit.