These markers can be allocated to three layers in
a neuroepithelium in zebrafish: the ventricular proliferation zone
(VZ) is positive for deltaA, the intermediate or subventricular zone
(SVZ) zone is marked by neurog1, and the post-mitotic mantle zone
(MZ) by elavl3 .
Not sure if neuroepihtelium corresponds to some part of neural tube but when we figure that out we should make the sub layers.