title: Phylogenesis of the general structure of immunoglobulins. Rigidity of 7 S immunoglobulins and restricted flexibility of the 17 S immunoglobulins of the tortoise, Testudo horsfieldi.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D007106:Immune Sera; D007122:Immunoelectrophoresis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M; D007136:Immunoglobulins / Q000032:analysis* / Q000302:isolation & purification; D008322:Mammals; D008970:Molecular Weight; D011487:Protein Conformation; D011817:Rabbits / Q000276:immunology; D013045:Species Specificity; D013050:Spectrometry, Fluorescence; D013997:Time Factors; D014426:Turtles; D014461:Ultracentrifugation
chemical_list: D007106:Immune Sera; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins