The polyclonal antibody recognizes mouse LPLUNC1 (Long palate, lung and nasal epithelium clone 1). LPLUNC1, also known as BPI fold-containing family member B1 (BPIFB1), is a protein present in the trachea, the epithelium and submucosal glands of larger airways and some smaller airways. It is also found in minor mucosal glands of the nasal cavity and more abundantly in minor, compared with major, salivary glands. Currently, the function of LPLUNC is unknown. It may be involved in the innate immuneresponse to bacterial exposure in the mouth, nasal cavities, and lungs. Recently, a significant association between a specific LPLUNC1 SNP (single nucleotidepolymorphism), located in the promoter region of the gene, and susceptibility to infection by the cholera-causing bacterium Vibrio cholera has been identified. However, its precise role in susceptibility to infection and/or the development of disease needs to be further elucidated.