Proteome Sciences plc is a protein biomarker company. The Company's principal activity includes biomarker research and development in applied proteomics and workflows using techniques to detect and characterize differentially expressed proteins in diseases for diagnostic, prognostic and therapeutic applications. It operates through three geographic regions: the United Kingdom, Germany and the United States. Through the United Kingdom segment, it provides protein separation and mass spectrometry capabilities for identification and analysis of post-translational modification of proteins particularly in protein phosphorylation, image analysis and bioinformatics. Through the Germany segment, it provides protein profiling technologies, including Tandem Mass Tags (TMT), which offers quantitation of various proteins for the discovery of biomarkers mass spectrometry. PS Biomarker Services provides integrated proteomic services for biomarker discovery, validation and assay development.