A real-space representation of the correlations in apo-GlxR from Fig. 4. (Red indicates correlated, blue is anticorrelated, and white is uncorrelated motion, with respect to the chosen reference residue.) For (a)–(f), the reference residue and bound state of the dimer is given: (a) 127 apo, (b) 127 holo-1, (c) 127 holo-2, (d) 71 apo, (e) 82 apo, and (f) 82 holo-1. The green circle shows the correlated residue in each case. To see this figure in color, go online.