A “kinemage” (kinetic image) is a scientific illustration presented as an interactive computer display. Operations on the displayed kinemage respond immediately: the entire image can be rotated in real time, parts of the display can be turned on or off, points can be identified by selecting them, and the change between different forms can be animated. A kinemage is prepared in order to better communicate ideas that depend on 3-dimensional information. The kinemages are distributed as plain text files of commented display lists and accompanying explanations. They are viewed and explored in an open-ended way by the reader using a simple graphics program called Mage. A utility called Prekin makes a starting kinemage from a PDB-format coordinate file which can then be modified on-screen in Mage or off-line in any text editor.