The KeyTec® TR - FRET Tool - Box series of products provide flexible solutions for developing protein - protein interaction experiments. This series includes tag antibodies (such as Anti - HIS, Anti - GST, etc.), secondary antibodies (such as Anti - Human IgG, etc.) and proteins (Streptavidin, Protein A, etc.) conjugated with TR-FRET fluorescence resonance energy transfer donors (Solar Eu/Solar Tb) or fluorescence resonance energy transfer acceptors (LA/HX), allowing you to develop your own TR-FRET experiments like 'building blocks'.