Research Article
Ammonium Ion Exchanged Zeolite for Laser Desorption/Ionization Mass Spectrometry of Phosphorylated Peptides
Figure 1
Mass spectra of SubP measured with (a) CHCA only, (b) CHCA/HZSM5, and (c) CHCA/NH4ZSM5. Insets are magnifications of the mass region less than 400 Da.