To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1 Identification of in vivo Hox13-binding sites reveals an essential locus controlling zebrafish brachyury expression Zhi Ye, Christopher R. Braden, Andrea Wills, and David Kimelman Development 2021. 148:None-None; doi: 10.1242/dev.199408 Download Original Video