The dynamic range and low stoichiometry of protein phosphorylation frequently demands the enrichment of phosphorylated peptides from protein digests prior to mass spectrometry. Several techniques have ...

MALDI–MS spectra of nonderivatized and Cou-derivatized model peptides at different concentrations; EIC chromatograms corresponding to degraded peptides from GSSSS (such as GSSS, SSSS, GSS, SSS, GS, ...