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Structure at residue Q25 for RBD monomer (left) and dimer (right) with the correlation coefficient of dihedral angle motions mapped to the main chain Cα (see color scale from −0.5 to +0.5). Key residues with negative correlation coefficients are labeled in blue, with positive correlation coefficients in red, possible signal pathway 1 pointed out in red arrows, and possible signal pathway 2 in magenta arrows.
