The study aims the development of a sensitive strategy for combined quantitative proteomics and phosphoproteomics. 3 ERLIC-based strategies, applicable for low-sample-amount experiments (~150 µg per condition), were evaluated and compared . Three samle sets have been uploaded. 16 fractions ERLIC-1-SCX/RP (2 replicates) for phosphopeptide enrichment, 8 fractions SCX-EL (2 replicates), 12 fractions ERLIC-2 (2 replicates). The following 3 strategies were compared: A 2D strategy -> sample set ERLIC-1-SCX/RP. A pseudo-3Dstrategy -> sample sets ERLIC-1-SCX/RP + SCX-EL and a 3D strategy -> sample sets ERLIC-1-SCX/RP + ERLIC-2