Updated FTP location. IMR32 cells stably expressing AGIA-AirID-CRBN-WT were treated with DMSO, 20 µM thalidomide, 10 µM lenalidomide, 10 µM pomalidomide, or 20 µM 5-hydroxythalidomide (5HT) in the presence of 10 µM biotin and 5 µM MG132 for 8 h in three biological replicates. After tryptic digestion, biotinylated peptides were enriched with Tamavidin 2-REV and analyzed by LC-MS/MS.