Cover illustration

September 2, 2003; 100 (18)
Cover image expansion

Cover image: Myocardial regeneration in the adult heart. The reconstituting myocardium consists of a cluster of closely packed, small, developing cardiomyocytes. Green indicates the presence of α-cardiac actin, a marker of myocyte differentiation; cellular nuclei are stained in blue. See the article by Urbanek et al. on pages 10440–10445.