A lipocalin of approximately 200 amino acids that functions as an iron transporter and is expressed by cells of BONE MARROW and many other cells with secretory functions. It is involved in APOPTOSIS and may function to limit pathogenic bacterial growth as part of the INNATE IMMUNE RESPONSE.

Synonyms: NGAL Protein, 0, Lipocalin 2, Lipocalin-2, Oncogene 24p3 Protein, Lipocalin 2 Protein, Siderocalin Protein, Neutrophil Gelatinase-Associated Lipocalin, Neutrophil Gelatinase Associated Lipocalin, Lipocalin-2 Protein