Retinoic acid is a potential dorsalising signal in the late embryonic chick hindbrain-7

(out of focal plane). . Transverse section through caudal rhombomere 1 showing roof plate expression (arrow). . Transverse section through the caudal hindbrain (dashed line in A) showing expression in the roof plate, rhombic lip and in cells adjacent to the floor plate. . Expression at e5 is similar to that at e3.5. . Transverse section at the level of rhombomere 4 shows that ventral expression is limited to the ventricular layer. . In addition, at the level of rhombomeres 5 and 6, characterises a discrete column of post-mitotic neurons (arrow). . Rat e6.5, a dorsal view of the hindbrain shows is still present in the roofplate. . Ventral view of the same hindbrain shows three ventrolateral -positive populations in the caudal hindbrain. . Transverse section through fourth ventricle roof plate (indicated in G). . Transverse sections through the caudal hindbrain at positions indicated in H show expression coincident with elevated levels of (Fig. 5J).<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>