Figure 4. Protein–protein interaction network annotations of DE endogenous peptides between MSSA and MRSA strains by the STRING database.

The protein–protein interactions were annotated from the STRING database and visualized by Cytoscape. The red nodes represent the translation-related proteins and ribosomal components in the precursor proteins of MRSA-AEP, while the blue nodes represent the translation-related proteins and ribosomal components in the precursor proteins of MSSA-AEP. The edges represent protein–protein associations from the STRING database.