Ready-to-use ELISA kits are available for the detection of apolipoprotein H (beta-2-glycoprotein I), an alias of the protein, apolipoprotein H. The official gene symbol is APOH. The kits can detect several species variants of the protein, including: human, mouse, rat, and bovine. The protein, with a mass of 38.3 kDa and length of 345 residues, is reported to be secreted. It may be known by other names, including: apolipoprotein H (beta-2-glycoprotein I), apo-H, activated protein C-binding protein, B2GPI, APC inhibitor, and beta-2-glycoprotein 1, and B2G1.