Optically measured 3D distances (IMAGE) Max-Planck-Gesellschaft Caption Two identical subunits of the bacterial citrate sensor in antiparallel (top) and parallel (bottom) arrangement. Optical 3D position measurements with MINFLUX detect the two states of the dimer formed by the subunits by very precisely measuring the distances between the fluorescent molecules at the protein ends. The ellipses show the measurement uncertainty of the two positions (1, 2 and 3 sigma). Credit MPI f. Multidisciplinary Sciences/ Steffen J. Sahl Usage Restrictions Use of images is limited to editorial coverage of scientific topics relating to the activities of the Max Planck Society. Any kind of commercial use (including, in particular, the exploitation of images by means of sale or incorporation in image databases or image catalogues) as well as any promotional use/use for merchandise purposes, disclosure to third parties or granting of related rights to third parties is expressly not permitted. License Original content 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.