Functional enrichment matrix for identified BAL proteins. Protein functional enrichment for 20 out of 23 BAL proteins identified, clustered by Gene Ontology (GO), InterPro (IPR), and Protein Information Resource (SP_PIR) term annotation, Ingenuity Pathways Analysis (IPA), or regulation by WT MHV-68 (MHV68) and MHV68/IL6 (infex). Dark gray, inclusion in functional term or strong regulation. Light gray, weak induction by MHV-68 or MHV68/IL6. Proteins involved in vitamin A (vit. A *) signaling and transport were enriched within the signaling category with p = 0.0094. Significance estimated by p-values (labeled p) for enrichment in annotated functional categories; Benjamini–Hochberg (pBH) false discovery probability values for IPA category analysis. n.s. = not significant.