Mode of action of the new microscopy method LLS-TDI-DNA-PAINT. On the top right, the RTX antibody was visualised on a Raij-B cell: it is easy to see how it links the CD20 molecules in the membrane. Bottom right: the hedgehog-shaped appearance of a living Raji B cell after the antibody has bound. The surface protein CD45, which is homogeneously distributed on the cell surface, is also labelled in green. Credit: Arindam…