Lipopolysaccharides: Structural Principles and Biologic Activities

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Abstract
Structural principles of the three regions of the lipopolysaccharide molecule are briefly discussed. One of the recently available, chemically synthesized lipid A analogues has been tested for biologic activities. The preparation was found to be toxic, pyrogenic, and mitogenic. The amounts, however, needed for expression of effects similar to those of lipid A were about 500 times higher. These investigations are aimed at verifying the proposed structure of lipid A and at evaluating structure-activity relationships.

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