Focal Adhesion Kinase - FAK ( focal adhesion kinase) belongs to the group of non-receptor protein tyrosine kinases . It occurs in the cytoplasm of most cells , including osteoblasts. At the time of its activation , the interaction of integrin associated protein extracellular matrix call is incorporated into platelet adhesion . FAK kinase in the presence of these structures is closely related to a function that plays in cellular processes such as adhesion, migration, proliferation . FAK -deficient cells show a much slower growth and reduced mobility.

The role of communication symplastowej as part of an information exchange system between the cells of the body plant during its growth and development has been described as an example embriogenezyArabidopsis thaliana. Studies in recent years have demonstrated fact that one of the mechanisms of regulation of developmental processes are changes in the permeability of plasmodesmata between the cells of the embryo.