Fig. 2. Structure and nuclear density maps of the active site after joint refinement. The m2Fo – DFc maps are contoured at 1.0σ and the mFo – DFc maps are contoured at +3.0σ (green) and –3.0σ (red). (A) – subunit A, ND2; (B) – subunit B, ND2; (C) – subunit A, ND–, (D) – subunit B, ND–. RSZD– values for the N-terminal atom are given for the ND2 states to highlight if there are any extra atoms in the model. RSZD+ values for the N-terminal atom are given for the ND– states to highlight if there are any missing atoms in the model.
