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Dave Richardson's early computer graphics.A, multistrand ribbons for the intertwined Trp repressor dimer, on the Evans & Sutherland PS300 calligraphic display. B, an animation of conformational change in T4 lysozyme, in his Mage program, for the Protein Science journal and the first Apple computers in 1992. C, a later Mage display of ribbons for the two SOD dimers in the crystal asymmetric unit (metals as zinc-colored and copper-colored balls).
