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Newly designed centerpieces used in the Beckman Coulter XL-A and XL-I instruments allow the systems to provide precise, repeatable measurement of pharmaceutical sample aggregation. The XL-A/XL-I analytical ultracentrifuges (AUCs) provide a solution for drug discovery and vaccine development processes by characterizing a protein's behavior in free solution under physiological concentrations, temperatures and buffer conditions. The AUCs feature an operating system that does not require calibration or the use of standards. Beckman Coulter, Inc., 800-742-2345, www.beckmancoulter.com
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