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On Tue, 2006-09-26 at 14:07 -0400, [EMAIL PROTECTED] wrote: > I recently solved a structure at 1.7A by MAD. However, there is > always strong negative density arround all 8 selenium in the > protein during CNS refinement. The Selenium-methionines fit 2fo-fc > density well. I tried to use peak, edge or remote dataset with or > without scale anomalous flag on and all did not matter. Does > anybody have a solution for this matter? Set the occupancy to something below 1.0? Do you have any way of knowing what you're rate of incorporation was? -- ======================================================================= I think we're all bugs and mice, and are only different expressions of an all-inclusive cheese. - Charles Fort ======================================================================= David J. Schuller modern man in a post-modern world MacCHESS, Cornell University [EMAIL PROTECTED]