Extended Data Fig. 4. Map and model features of the Mec1-Ddc2 complex.
(a) 2D classes of Mec1-Ddc2 after a focused 3D refinement masking on Mec1-Ddc2 heterodimer, showing intrinsic flexibility of the complex across the dimer interface.
(b) Electron density features of the bound AMP-PNP, and (c) strong electron density (unsharpened map) showing the PRD-I interaction with the activation loop at two points (asterisked).
(d) Map to model FSC curves.