Ultrasound of normal 12-day-old mouse embryos
(wild-type) versus endothelial Klf2 knockout embryos reveals pericardial
edema, a sign of heart failure (arrowhead).
Image Credit: John Lee, MD, PhD, and Mark Kahn, MD, University
of Pennsylvania School of Medicine; Qing Yu, PhD, and Cecilia Lo,
PhD, National Institutes of Health; Developmental Cell.
version (694 KB, JPG, 300 DPI)