Protein interaction partners of FRUITFULL in inflorescence meristems and pistils by IP-MS.

To study the possibility that the tissue-specific gene targets and regulation by FUL are due to a different composition in the FUL transcription factor (TF) protein complex/es in both tissues, we determined the protein-protein interactions of FUL in planta. Inflorescence meristems (IMs) of 35S:AP1-GR ap1 cal pFUL:FUL-GFP plants were collected to identify meristem-specific protein complexes of FUL, and stage 12 - 16 pistils of pFUL:FUL-GFP ful-1 plants were collected for the pistil-specific FUL protein complexes. Protein complexes were isolated by immunoprecipitation (IP) using anti-GFP antibodies and protein identification was performed using LC-MS/MS, followed by label-free protein quantification.