Original sentence: Core oligosaccharide contains unusual sugars such as heptose and 3-Deoxy-d-mannooctulosonic Acid (also known as KDO, keto-deoxyoctulosonate).The core oligosaccharide is attached to lipid A, which is also in part responsible for the toxicity of gram-negative bacteria
Edited sentence: The Core oligosaccharide normally contains sugars such as heptose and 3-deoxy-D-mannooctulosonic Acid (also known as KDO, keto-deoxyoctulosonate).The core oligosaccharide is attached to lipid A, which is also in part responsible for the toxicity of Gram-negative bacteria