title: The evolutionary origins of immunoglobulins and T-cell receptors: possibilities and probabilities.
authors.affiliation: Conceptual Immunology Group, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Langman
mesh_terms: D000486:Allergy and Immunology / Q000639:trends*; D000818:Animals; D019143:Evolution, Molecular; D007136:Immunoglobulins / Q000235:genetics*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*
chemical_list: D007136:Immunoglobulins; D011948:Receptors, Antigen, T-Cell