title: In an immunological twilight zone.
authors.affiliation: Max-Planck-Institut für Biologie, Abteilung Immungenetik, Correnstrasse 42, Tübingen, D-72076 Germany.
authors.forename: J
authors.initials: J
authors.lastname: Klein
mesh_terms: D000818:Animals; D005075:Biological Evolution; D007135:Immunoglobulin Variable Region / Q000235:genetics; D007136:Immunoglobulins / Q000235:genetics; D008285:Major Histocompatibility Complex; D010802:Phylogeny; D011946:Receptors, Antigen / Q000235:genetics; D011948:Receptors, Antigen, T-Cell / Q000235:genetics; D012754:Sharks / Q000235:genetics / Q000276:immunology; D014714:Vertebrates / Q000145:classification / Q000235:genetics* / Q000276:immunology*
chemical_list: D007135:Immunoglobulin Variable Region; D007136:Immunoglobulins; D011946:Receptors, Antigen; D011948:Receptors, Antigen, T-Cell; C092388:nurse shark antigen receptor