Protocol is the first step in a three-step process for the preparation and enrichment of phosphopeptides using immobilized metal affinity chromatography (IMAC) for the identification of the phosphopeptides by LC-MS/MS.  This procedure is used to prepare protein extracts from WEHI-231 cells.  This preparation method provides total cellular protein samples that are free of contaminating nucleic acids.

Protocol: Lysis and Protein Extraction from WEHI-231 Cells with TriPure Isolation Reagent Protocol