Cover illustration

Cover image expansion

Cover image: Semiconductor nanocrystals, attached to kinesin-driven microtubules, make visible the operation of molecular motors. The circular patterns produced when all images of a time-lapse movie are overlaid are the signature of single-molecule experiments, where the microtubule swivels around the position of a fixed motor. See the article by Leduc et al. on pages 10847–10852. Image courtesy of Cécile Leduc and Stefan Diez.