The BIACORE 3000 is an established, label-free Surface Plasmon Resonance (SPR) biosensor system designed for real-time analysis of biomolecular interactions. It provides comprehensive characterization of interactions, including kinetic constants, affinity, specificity, and active concentration of components. This system measures binding kinetics (association and dissociation rates), affinity (KD), and concentration. It features four flow cells that can be used individually, in series, or as two pairs, allowing for simultaneous monitoring of up to four interactions per injection cycle. The BIACORE 3000 supports automated sample loading and injection for up to 2 x 96 samples, with an analysis temperature range of 4 to 40°C. It offers low baseline noise (<0.3 RU RMS) and drift (<0.3 RU/min) for high data quality. Primary applications include kinetic and affinity characterization, screening and profiling, concentration measurements, low molecular weight interaction analysis, and thermodynamic studies. It is widely used in antibody affinity research, drug development, protein-protein interactions, and protein-DNA/RNA interactions. The system can detect interactions down to >180 Da with sensitivity into the 10 pM range. A unique feature of the BIACORE 3000 is its ability to recover bound analytes for subsequent MALDI MS identification, aiding in protein interaction mapping and target validation. The system's control software provides comprehensive data analysis tools, including kinetic fitting, affinity calculation, and concentration determination.