Skip to main content
. Author manuscript; available in PMC: 2011 Nov 15.
Published in final edited form as: Anal Chem. 2010 Oct 21;82(22):9211–9220. doi: 10.1021/ac102262m

Figure 3.

Figure 3

MALDI and SALDI mass spectra of peptide mixture. (a) 25 fmol peptides with CHCA matrix; (b) 25 fmol peptides on OTS-modified calcinated surface; (c) 5 fmol peptides with CHCA matrix; (d) 5 fmol peptides on OTS-modified calcinated surface; The analyte was the mixture of [Sar1, Thr8]-angiotensin II (M1) and neurotensin (M2), equal amount in sample. Asterisks (*) represent peaks assigned to fragment ions of peptides; squares (□) represent peaks from CHCA related ions. NL: normalized level.