For the identification of protein interaction partners, we can identify proteins following immunoprecipitation/co-affinity. Furthermore, we offer proximity-based labeling strategies (e.g. BioID, TurboID, APEX2) in combination with high resolution mass spectrometry to identify protein–protein interactions or in living cells. For determining the proteins abundances different quantification strategies are available, both label-free and label-based (see Quantitative Proteomics section). In case you would like to perform such experiments, we would be happy to assist in the planning phase.