S100A9 and Sepsis: Among the top 14 up-regulated extracellular protein-encoding genes in the sepsis and control groups that had the highest logFC values were S100A8, IL6, MMP8, S100A9, CSF3, S100A12, FCGR3B, CD177, FCN1, ATP6V0A4, CXCL3, SLURP1, CXCL11, and LY96 (Figure 3B).