Assertion: neuroepithelium | /r/MadeOf | functional tight junctions
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text: The latter association presumably explains why prominin is selectively found at the apical surface of neuroepithelial cells not only at the neural plate stage (E8 mouse embryo; data not shown), when the neuroepithelium contains functional tight junctions (6) which are known to prevent lateral diffusion of transmembrane proteins between the apical and basolateral domains, but also after neural tube closure (E9 mouse embryo; Fig. 2), when functional tight junctions have disappeared (6).