Hi Tom I think I found the problem: units in my data are reverse nm, whereas by default angstroms are taken. It would be nice to have "choose units" in options. Alex
Not sure why your test of the Chimera SAXS profile calculation did not work well for lyzosome. I've attached two images using Chimera daily build 31662 (Oct 17) where it worked fine for lyzosome with the experimental profile I have. Maybe the minimum q = 0.2 is related to your experimental profile not having small q values? YZ in our lab works on the Chimera SAXS tool and could give a better answer.
Tom
Alexander Shkumatov, predoc -- Biological Small Angle Scattering Group EMBL Hamburg Outstation c/o DESY -- Building 25A Notkestraße 85 -- 22603 Hamburg -- Germany tel: +49 40 89902 178 fax: +49 40 89902 149 Email: shkumatau@embl-hamburg.de ----------------------------------------------------------------------