mild acetic acid hydrolysis of endotoxin ( lipopolysaccharide-protein complex ) of shigella dysenteriae type 1 ( s and r forms ) yielded a lipid a-protein complex that consisted of amino acids , fatty acids , and sugar and , in terms of chemical composition , displayed no marked differences between the s and r forms .
C0023810
lipopolysaccharide
C0023767
lipid a