Another tight junction protein, PARD3, remains at the apical side of the cell co-localizing with N-cadherin and keeps the apical face of the neuroepithelial cell intact. In the absence of occludin some polarity is still lost and the neuroepithelial cell gives rise to the radial glial cell.
PARD3, another tight junction protein, stays at the edge of the cell, nears N-cadherin, maintaining the top surface of the neuroepithelial cell. In its absence, occludin, some polarity is still lost, and the neuroepithelial cell evolves into a radial glial cell.