Cover picture: Plasma-membrane Ca²⁺-ATPase (PMCA) in cochlear hair cells. Hair bundles of cochlear outer hair cells (inset, top right) are richly endowed with PMCA (top panel: green, PMCA; red, actin), which is located on the plasma membrane of the stereocilia (bottom panel). For details, see the article by Dumont et al. in this issue (pages 5066-5078).