To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S3. Thin-section 3D epifluorescent opacity-rendering of z-stacked image of sox2 (magenta) and β-catenin (green) double immunofluorescence labeling the superficial (taste/tooth junction) dental stem cell niche in the catshark (Scyliorhinus canicula). Sox2+ progenitors in sharks link taste development with the evolution of regenerative teeth from denticles Kyle J. Martin, Liam J. Rasch, Rory L. Cooper, Brian D. Metscher, Zerina Johanson, and Gareth J. Fraser PNAS. 2016. 113:14769-14774 DOI: 10.1073/pnas.1612354113 Download Original Video Browse All Videos »