Fig. 7From: Comparative morphology and development of extra-ocular muscles in the lamprey and gnathostomes reveal the ancestral state and developmental patterns of the vertebrate headWhole-mount in situ hybridization in st. 26 lamprey prolarvae. A PitxA (a1: Lateral view; a2, 3: Sections). b Gsc (b1: Lateral view; b2: Section). c TbxA (c1: Lateral view; c2: Section). d Schematic illustration of the PitxA, Gsc, and TbxA expression patternsBack to article page