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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: J Immunol Methods. 2010 Nov 13;364(1-2):50–64. doi: 10.1016/j.jim.2010.11.001

Figure 2.

Figure 2

Peptide titration by MALDI-TOF MS. Panel A: Angiotensin-I (positive control) Panel B: CPTAC-38b and CPTAC-23c. Angiotensin-I was chosen as a model peptide since it ionizes extremely well by MALDI whereas the other peptides were more typical of tryptic peptides chosen as surrogates for protein targets and ionize moderately well (CPTAC-38b) or poorly (CPTAC-23c).