The movement of the ISP, in a 3-D movie (stereo-pair for crossed-eye viewing). The catalytic subunits of one monomer only are shown as spacefilling models. The mobile head (red) is shown rotating about the axis relating the positions in the absence ("down") and presence ("up") of stigmatellin. ISP tail, dark blue; cytochrome b, light blue; cytochrome c₁, green. (Note, the flexible link (residues 69-72) has been clipped out of the structure, since coordinates are available only for the initial and final positions.)

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©Copyright 1996, Antony Crofts, University of Illinois at Urbana-Champaign, a-crofts@uiuc.edu