LCN2 and infection: In addition to CD11b, several proteins are known to be strongly expressed by neutrophils, such as myeloperoxidase (MPO), the antimicrobial protein lipocalin (LCN2), neutrophil gelatinase-associated lipocalin (NGAL), and neutrophil elastase (ELANE), were strongly enriched in AM upon infection (Figure 2C; Supplementary Table S1).