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Hi Vincenzo Any self-respecting program that computes anything from the delta-anoms *should* (but it's always wise to verify that it does!) check that those delta-anoms were actually measured (in an MTZ file this is flagged by having sigma(delta-anom) > 0), and doesn't simply treat them as measured with a value of zero. In the case of centrics of course there is no delta-anom to be measured (Friedel equivalents will be averaged), so no E's should be generated from them. -- Ian > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Vincenzo Carbone > Sent: 27 October 2005 09:23 > To: [email protected] > Subject: [ccp4bb]: anomalous data > > I was wondering as im new to determining protein structures > using heavy atom data etc, is it really necessary to exclude > centric data when calculating Es from anomalous differences. > Will it affect my use of RANTAN. > > ********************************************************************** CONFIDENTIALITY NOTICE This email contains confidential information and may be otherwise protected by law. Its content should not be disclosed and it should not be given or copied to anyone other than the person(s) named or referenced above. If you have received this email in error, please contact [EMAIL PROTECTED] **********************************************************************
