function on intercellular junctions
to link cells together into a functional unit
3 types of junction
occluding/tight
anchoring/adherent
communicating/gap
what is a junctional complex
close association of several types of junction
occluding junctions function
make cells pack tightly and prevent diffusion
anchoring junctions function
link submembrane actin bundles of adjacent cells
communicating junctions
allow selective diffusion due to hundreds of pores