Source:http://linkedlifedata.com/resource/umls/id/C1167622
GO: The selective, non-covalent, often stoichiometric, interaction of a molecule with one or more specific sites on another molecule. [GOC:ceb, GOC:mah, ISBN:0198506732],NCI: Involves temporary, non-covalent binding of two or more molecules as a result of intermolecular physical forces and often involves spatial complementarity between the interacting objects.