Two-dimensional crystals of photosynthetic reaction centers from Chloroflexus aurantiacus were obtained from protein-lipid-detergent micelles by detergent dialysis. The size of crystals was up to 2 μm. Some of them were multilayered crystals. However, other crystal forms were also observed. Preliminary image processing analysis showed that crystals of one crystal form referred to two-sided plane group p2 and had the following unit cell parameters: a = 17,6 nm, b = 18,0 nm, γ = 84°. The contour map of the crystal stain-excluding region was calculated by the Fourier-filtering procedure at about 2 nm resolution.
