Proteome Sciences PLC is engaged in the research and development, primarily in the field of proteomics, using techniques to detect and characterize proteins in diseases for diagnostic, prognostic and therapeutic applications. The company has research facilities in London, United Kingdom and Frankfurt, Germany. Through its ProteoSHOP toolkit, Proteome Sciences PLC provides proteomics solutions, including two-dimensional gel-based electrophoresis (2DE) and gel-free protein sequence tag technologies (PST, qPST and TMT), to pharma, biotechnology and diagnostic companies. The company has an interest of 42.69% in Intronn Inc., an associate company. On September 21, 2007, the company announced that VIRxSYS Corporation has acquired the core technology and assets of Intronn Inc.