Dionex is pleased to announce the release of the next-generation ProPac® SCX-20 column, providing exceptionally high resolution for characterization of protein variants. The ProPac SCX-20 column has a strong cationexchange surface chemistry on a unique nonporous pellicular resin, together providing exceptionally high resolving power, permitting the separation of protein variants that differ by as little as one charged residue. Hydrophobic interactions with the resin are essentially eliminated for very efficient peaks. A proprietary grafted cation-exchange surface provides pH selectivity control resulting in highresolution separations. This column, along with the other protein columns from Dionex Corporation, provides unmatched column-tocolumn and lot-to-lot reproducibility.

For details on this and other ultrahigh-efficiency and high-resolution columns, visit www.dionex.com

Dionex (NASDAQ:DNEX) is a global leader in the manufacturing and marketing of liquid chromatography and sample preparation systems, consumables, and software for chemical analysis. The company's systems are used worldwide in environmental analysis and by the life sciences, chemical, petrochemical, food and beverage, power generation, and electronics industries. Our expertise in applications and instrumentation helps analytical scientists to evaluate and develop pharmaceuticals, establish environmental regulations, and produce better industrial products.

ProPac is a registered trademark of Dionex Corporation.