Human Apolipoprotein H/ApoH Antibody

ApoH (Apolipoprotein H; also beta 2-Glycoprotein 1/ beta 2-GPI) is a 50 kDa, secreted, variably glycosylated, monomeric member of the complement control superfamily of molecules. It is produced by hepatocytes and is bound to HDL particles. Circulating ApoH blocks the intrinsic clotting pathway, and binds to exposed phospholipids on apoptotic cells. Mature human ApoH is 326 amino acids (aa) in length (aa 20‑345). It contains four Sushi repeats (aa 21‑260) and one C-terminal kringle domain (aa 261‑345) that binds heparin and phospholipids. At least two ApoH isoforms exist, one showing a 31 aa substitution for aa 140‑345, while a second represents a bioactive plasmin cleavage product that removes the C-terminal nine amino acids. Mature human ApoH shares 76% aa identity with mouse ApoH.