Figure 4.

MALDI QqTOF MS and MS/MS analyses on the in-gel tryptic digest of the 43.6 kDa protein band. (A) MS spectrum of the trypsin digested peptides. The corresponding Gp10B peptides are shown in the parenthesis. (B) MS/MS sequencing of a typical peptide at m/z 2244.13 yielded a series of C-terminal y fragments (labelled on the top of the fragment ions) which identified the peptide sequence containing the residues 353–372.