4 Biological Models (image) DOE/Lawrence Berkeley National Laboratory Caption Fluctuation X-ray scattering is the basis of a new technique for rapidly modeling the shapes of large biological models, here demonstrated from existing diffraction data and superposed (gray envelopes) on known high-resolution structures. Top left, lysine-arginine-ornithine binding protein; top right, lysozome; bottom left, peroxiredoxin; and, bottom right, Satellite Tobacco Mosaic Virus. Credit Lawrence Berkeley National Laboratory Usage Restrictions with credit as given Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.