Figure 1.

Crystals of Tth-MCO obtained by (a) the sitting-drop vapour-diffusion method and (b) the hanging-drop vapour-diffusion method (microseeding technique); (c) crystals of apo-Tth-MCO obtained by the hanging-drop vapour-diffusion method. All photographs were taken without a polarizer in order to obtain real colour images and all of the images were obtained at the same magnification. In the case of the plate-like crystals observed in (c) an acupuncture needle was used to separate and cut the crystals before mounting.