Fig. 6. Comparison of the SCGD-MS (a) and ESI-MS3 (b) spectra of biotinylated, phosphorylated SAMS peptide (biotin-HMRSAMpSGLHLVKRR). Each spectrum represents the average ion signal from a 5 μL injection of 1.1 nmol of SAMS peptide. Note the significant differences between signals and signal-to-noise ratio between the two spectra.
