Siderocalin-like lipocalin tightly binding a variety of bacterial ferric siderophores, also binds long-chain unsaturated fatty acids such as linoleic acid, oleic acid, arachidonic acid and, with a lower affinity, long chain saturated fatty acids such as steraic acid. May act as an antibacterial factor, through dual ligand specificity, both as a siderophore-sequestrating molecule and a lysophosphatidic acid (LPA) sensor. Monomer. Expressed in egg white (at protein level). Expressed in the magnum of the oviduct (at protein level) (PubMed:25436390). Preferentially synthesized in nonproliferating cells. Down-regulated by dietary stress. Significantly decreased expression between days 0 to 5 in egg whites of eggs laid by corticosterone-fed hens (at protein level). Decreased expression at day 14 in the magnum of the oviduct in the corticosterone-fed laying hens. Does not seem to be glycosylated. Developmentally regulated in chick embryo. Belongs to the calycin superfamily. Lipocalin family.