To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Endocardial identity is established during early somitogenesis by Bmp signalling acting upstream of npas4l and etv2 Samuel J. Capon, Veronica Uribe, Nicole Dominado, Ophelia Ehrlich, and Kelly A. Smith Development 2022. 149:None-None; doi: 10.1242/dev.190421 Download Original Video