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An antagonist blocks the action of an agonist. When bound to a receptor it produces a conformational change that causes the cell to maintain neutral signal transduction activity, whether or not an agonist is present. AG Scientific delivers quality assured biochemicals directly to scientists, from small-scale to bulk orders. Our leadership in bulk supply allows us to provide custom product packaging and create multiple product forms. We offer “just in time” delivery, private labeling, and custom formulations for specific research needs.