PTGDS and infection: We evaluated protein abundance changes during infection with WT GBS for these 122 proteins and found that only a single protein exceeded a π score of 1 (increased abundance; Slc38a5), with 5 proteins exceeding a P value-based significance threshold (decreased abundance, Igf1r, Glb1, Ptgds, and Rab11fip1; increased abundance, Slc38a5) (P < 0.05) (Fig. 2B).