Figure 5

Results of the identification of target peptide (2554.8) containing fraction by LC-MS/MS. The three major peptides were identified as fragments of the same protein fibrinogen. (A) MS/MS spectrum of peptide (K.SSSYSKQFTSSTSYNRGDSTFES.K, [M + H]⁺: 2554.6; M + 2H]²⁺:1277.7); (B) MS/MS spectrum of peptide (S.SSYSKQFTSSTSYNRGDSTFES.K, [M + H]⁺: 2467.5; [M + 2H]²⁺:1234.7); (C) MS/MS spectrum of peptide (K.SSSYSKQFTSSTSYNRGDSTFESKSY.K, [M + H]⁺:2933.0; [M + 3H]³⁺: 978.53).