Ready-to-use ELISA kits are available for the detection of Microfibrillar-associated Protein 4, an alias of the protein, microfibril associated protein 4. The official gene symbol is MFAP4. The protein, with a mass of 28.6 kDa and length of 255 residues, is reported to be secreted. It may be known by other names, including: microfibrillar associated protein 4, and microfibril-associated glycoprotein 4.