Figure 3

Detection of ERG peptide VIVPADPTLWSTDHVR in the VCaP-urine system. A. The number of VCaP cells for each PRISM-SRM analysis data point was 600, 3,000, 6,000, 12,000, 30,000, 60,000, 170,000, respectively. Heavy indicates heavy internal standard peptide; Light indicates endogenous peptide. B. The light/heavy peak area ratio shows good linearity.