NCIt definition : The cadherins are transmembrane glycoproteins involved in calcium dependent specific
cell-cell adhesion through homophilic binding. They are crucial for morphogenesis
and synapse formation, but also are involved in tumor invasion. The classical cadherins
have five homologous extracellular domains and a cytosolic domain which binds through
catenin to the cytoskeleton. The extracellular domains are immunoglobulin-like beta-sandwiches
comprising usually 7 strands in the two sheets.;