APOC2 and infection: Critically, the proteins with elevated abundance during infection at 15 dpi captured known immune-associated proteins, including haptoglobin, eosinophil peroxidase, and immunoglobulins (Ighg1, Ighg, and Ighg2b), whereas proteins with reduced abundance included apolipoprotein C-II, associated with maintaining lipid homeostasis (60).