what binds cell together
Cadherins (named for calcium-dependent adhesion) are a class of type-1 transmembrane proteins. They play important roles in cell adhesion, forming adherens junctions to bind cells within tissues together. They are dependent on calcium (Ca 2+) ions to function, hence their name. The cadherin superfamily includes cadherins, protocadherins, desmogleins, and desmocollins, and more.