title: Relations between structures of three K polysaccharides of Escherichia coli and cross-reactivity in antipneumococcal sera.
mesh_terms: D000818:Animals; D004926:Escherichia coli / Q000276:immunology*; D006736:Horses; D007106:Immune Sera; D007120:Immunochemistry; D011135:Polysaccharides, Bacterial; D011233:Precipitin Tests; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D007106:Immune Sera; D011135:Polysaccharides, Bacterial