Provided below are ELISA kits targeting BPI fold containing family B member 4, a human protein encoded by BPIFB4. This protein is 614 amino acids long, with a mass of 65.1 kDa, and is a member of the BPI/LBP/Plunc superfamily, BPI/LBP family. 2 isoforms have been identified. This is reported to be a cytoplasmic and secreted protein. Glycosylation sites have been reported. Other alias names for this protein include: likely ortholog of rat probable ligand-binding protein RY2G5, long palate lung and nasal epithelium carcinoma associated 4, long palate lung and nasal epithelium carcinoma-associated protein 4, LPLUNC4, and RY2G5.