*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.ccp4.ac.uk *** Dear Dr. Kleywegt, I am sorry if I hurt your feelings. I apologize if I misunderstood what you were trying to say. Sincerely, Lothar Esser Dr. Lothar Esser NIH / NCI Tel. 301-435-6316 email lesser@helix.nih.gov