Cover image

Yolk sac vasculature labeled with vital fluorescent markers in a Tg(Flk1-myr::mCherry) × Tg(Flk1-H2B::EYFP) mouse embryo at the E9.5 stage. The transgenic model and the live embryo imaging approach are described by Larina et al. (doi: 10.1101/pdb.top071498) in this issue. Image courtesy of Irina V. Larina and Mary E. Dickinson.