CTSD and infection: In the group of proteins categorized as neutrophil degranulation (GO:0043312) (Fig. 3A), we found several proteins associated with KEGG pathway identifiers for lysosomes and phagosomes, among which lysosomal protective protein/cathepsin A (GenBank accession no. CTSA [P10619]), cathepsin Z (CTSZ [accession no. Q9UBR2]), cathepsin D (CTSD [accession no. P07339]), with decreased abundance in the three data sets, and lysosome-associated membrane glycoprotein 2 (LAMP2 [accession no. P13473]) that was enriched in all infection conditions (Fig. 3A).