Using this approach, we obtained phospho-proteomic data on the LATS1 interactome from cells treated with two proapoptotic signals: FAS and etoposide, which both activate LATS kinase activity [28].To identify the LATS1 interactome we transiently expressed GFP-LATS1 in HeLa cells, immunoprecipitated GFP-LATS1 with anti-GFP antibodies and identified the associated proteins using mass-spectrometry. Unspecific binding proteins were discarded by comparing with the control GFP IP.