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. 2003 May 7;4:4. doi: 10.1186/1471-2091-4-4

Figure 1.

Figure 1

Partial spectrum of PSD fragment ions obtained from m/z 1479.76 precursor ion. Masses of N-terminal ion series of the b and a type [12] are in agreement with the modified sequence Acetyl-SSRYRVEYHK. His and Tyr immonium ions, as well as C-terminal ions (y type) confirm the sequence of the modified peptide.

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