Dear colleagues: Hereby, I would like to expose a problem I encountered during the data processing of one of my crystals. Recently I collected a full dataset of a native protein-DNA crystal at an energy of 12667KeV. To my surprise, after processing with XDS I can see that I have significant values of anomalous correlation up to 5 Angstrom resolution. Using the fluorescence scan on the beam, I could discard the presence of the following heavy atoms that could have ended up in my drop due to cross-contamination; Se, As, Fe, Zn and Pr. So far, my attempts to use this dataset for phasing have been sadly unsuccessful. I would like to know if somebody has experience in this kind of problem and can gently help with some advices.
Thank you all in advance Aleix ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
