All-inclusive MSD GOLD SULFO-TAG NHS-Ester Conjugation Packs include the components and guidance that may be necessary for conjugating and purifying detection reagents with MSD GOLD SULFO-TAG label. The conjugates are stable, may be used at low concentrations, have low non-specific binding, and result in highly sensitive detection. MSD GOLD SULFO-TAG NHS-Ester is the product of choice for conjugating molecules that contain primary amines (e.g., lysine in proteins). It has been developed through rigorous multi-lot testing for reproducibility and precision, and has exceptional intra-lot and inter-lot consistency.