[phenixbb] the different between 2mFo-DFc and mFo-DFc map

hi,everybody, By phenix.refine outputde two likelihood-weighted maps: 2mFo-DFc and mFo-DFc.When they were displayed in coot, There is a vast difference between them, why? Thanks dream830106 　　　　　　　　[email protected] 　　　　　　　　　　2009-06-30