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Mass spectrometry (MS) spectra of the peaks corresponding to selected peptides (left) and muropetides (right) derived from Staphylococcus aureus ST154 (a) and Staphylococcus epidermidis CCM 4418 (b) peptidoglycan after the action of LYSDERM-S. S epidermidis-specific ions are labeled with bold numbers corresponding to differences in the interpeptide bridge (30 Da represents substitution of glycine with serine residue).
