Twin analyses. (a) Simulated pattern showing a k = constant reciprocal-space section. Reciprocal-lattice points of twin domains 1 and 2 are shown as black and red points, respectively. (b) Observed diffraction pattern showing the (h1l) zone corresponding to the simulated pattern in (a). Predicted reflection positions of twin domains 1 and 2 are shown in the middle and right panels, respectively. (c) The distances between neighbouring reciprocal-lattice points from alternative lattices are plotted against the index h. (d, e) The average intensities of the measured (black filled circles) and the detwinned (red triangles) intensities for the galactose complex crystal (d) and the DGJ complex crystal (e), respectively, plotted against the index h.