SomaLogic, Inc. operates as a protein biomarker discovery and clinical diagnostics company in the United States. It develops slow off-rate modified aptamers (SOMAmers), which are modified nucleic acid-based protein binding reagents that are specific for their cognate protein; and offers proprietary SomaScan services, which provide multiplex protein detection and quantification of protein levels in complex biological samples. The company's SOMAmers/SomaScan technology enables researchers to analyze various types of biological samples for protein biomarker signatures, which can be utilized in drug discovery and development.