Ready-to-use ELISA kits are available for the detection of lipocalin 4, an alias of the protein, odorant binding protein 2B. The official gene symbol is OBP2B. The protein, with a mass of 19.5 kDa and length of 170 residues, is reported to be secreted. It is a member of the Calycin superfamily, Lipocalin family and may be known by other names, including: OBPIIb, LCN14, and odorant-binding protein IIb.