The matching of physical models to three-dimensional electron-density maps: a simple optical device.
D001703:Biophysics / Q000295:instrumentation; D008961:Models, Structural; D055096:Optical Devices; D055095:Optics and Photonics; D010781:Photography / Q000295:instrumentation; D011506:Proteins; D012260:Ribonucleases
D011506:Proteins; D012260:Ribonucleases