A, both native and recombinant forms, to the pharmaceutical industry. In 2010-2013, Protein A accounted for the majority of the company's product sales. The company also provides growth factors to increase the productivity of cell-based bioproduction, multiple alternating tangential flow (ATF) systems, and a line (OPUS) of chromatography columns scaled to manufacture of product for testing in clinical trials. The OPUS product line contains a range of column sizes, the size and composition of which are dependent upon customer requirements, thus the full name of "Open Platform, User Specified". The smaller sizes of columns depend upon proprietary technology licensed from BioFlash Partners, while the larger sizes are based on Repligen-developed proprietary technology. Notes References External links Manufacturing support companies Companies based in Massachusetts Companies listed on the Nasdaq 1981 establishments in Massachusetts