FIGURE 12:
Model for addition of newly synthesized cldns and ocln to epithelial tight junctions. (A) Newly synthesized cldns (green) are added from the lateral membrane to basal strand breaks; old cldns (magenta) are turned over by endocytosis. (B) Although there is lateral ocln, newly synthesized ocln (green) appears first at apical junctional contacts; turnover of both new and old (magenta) ocln occurs by endocytosis.