Figure 6.

Isotope envelopes of A₁₀, A₁₈, and A₂₃ fragment ions of WALP16(+10) incorporated in DMPC bilayers in undeuterated buffer (A) as opposed to the analogous fragment ions after incubation in deuterated buffer (B). The arrows and numbers indicate the average m/z values for the fragment ions. The differences between the average m/z values of the undeuterated and the deuterated fragment ions are printed in boldface in parentheses. These spectra were recorded when about 20 of 32 hydrogens had exchanged. The amino acid sequence (Upper) indicates how the A-fragment ions are formed (a, acetyl; e, ethanolamine).