Source:http://linkedlifedata.com/resource/umls/id/C1148575
GO: Interacting selectively and non-covalently with an antigen, any substance which is capable of inducing a specific immune response and of reacting with the products of that response, the specific antibody or specifically sensitized T-lymphocytes, or both. Binding may counteract the biological activity of the antigen. [GOC:jl, ISBN:0198506732, ISBN:0721662544],NCI: Antigen Binding Interaction involves specific and high affinity non-covalent interaction (binding) of an endogenous antibody through intermolecular physical forces of attraction and spatial complementarity with a soluble or particulate substance (antigen) that induces an immune response.