Retinoic acid is a potential dorsalising signal in the late embryonic chick hindbrain-11

H (white arrow) and the isthmus (white arrowhead). . view of the dissected isthmus (arrow) showing a ring of expression, weakening at its dorsal apex. . Expression at the isthmus (arrow) and otic vesicle (white arrow) at e6. . Transverse section through isthmic region (dashed line in C) shows expression concentrated in bilateral foci within the isthmus. . Transverse section through the presumptive inner ear shows in the endolymphatic duct (white arrow) and saccule (white arrowhead).<p><b>Copyright information:</b></p><p>Taken from "Retinoic acid is a potential dorsalising signal in the late embryonic chick hindbrain"</p><p>http://www.biomedcentral.com/1471-213X/7/138</p><p>BMC Developmental Biology 2007;7():138-138.</p><p>Published online 19 Dec 2007</p><p>PMCID:PMC2266733.</p><p>