Scope:To describe the procedure for the lysis, reduction\/alkylation, trypsin digestion, and clean-up of tissue. Lysis will cover the lysing of tissue and protein concentration. Acetone precipitation will cover the precipitation of proteins. Digestion will cover the process for digesting 100 \u00b5g of protein using the Agilent AssayMap Bravo Robot and Promega Rapid Trypsin\/LysC. The clean-up of the cells will cover the desalting process on the Agilent AssayMap Bravo and the subsequent preparation of the samples for LC\/MS peptide analysis.Expected Outcome\/Data:Cell samples lysed, digested, and desalted for analysis on MS instrument. Samples to be analyzed within one or two days of desalting.