Ready-to-use ELISA kits are available for the detection of insulin-like growth factor binding protein 5, an alias of the protein, insulin like growth factor binding protein 5. The official gene symbol is IGFBP5. The protein, with a mass of 30.6 kDa and length of 272 residues, is reported to be secreted. It may be known by other names, including: IBP5, IGFBP-5, IGF-binding protein 5, and IBP-5.