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Three domains with the immunoglobulin fold with high and medium Z-scores. (a) D1ex0a2 (Z-score = 10.9, the highest). (b) D3frua1 (Z-score = 10.4, the second highest). (c) D1ogae1 (Z-score = 5.753, near the median). Each structure is colored in rainbow colors from blue for the N-terminus to red for the C-terminus. The viewing direction is down the calculated symmetry axis, indicated by black rod, which is not visible because of the black ball placed at the center of the axis.
