Extended Data Fig. 8: Acidic mucins in the foxI+ domains of the pharyngeal gill bars in B. floridae.
From: Ion regulation at gills precedes gas exchange and the origin of vertebrates
Positive staining for Alcian blue shows acidic mucins in the foxI+ domains of the pharyngeal gill bars in B. floridae (outlined section). Counterstained with Nuclear Fast Red, scale bar = 50 μm. This experiment was repeated independently three times with similar results.
