title: Electron microscopy of the natural IgM-like hemagglutinin of the ratfish (Callorhynchus callorhynchus).
mesh_terms: D000818:Animals; D005075:Biological Evolution; D055598:Chemical Phenomena; D002621:Chemistry; D005399:Fishes / Q000276:immunology / Q000648:ultrastructure*; D006388:Hemagglutinins; D007075:Immunoglobulin M; D008970:Molecular Weight; D011108:Polymers
chemical_list: D006388:Hemagglutinins; D007075:Immunoglobulin M; D011108:Polymers