Apolipoprotein H (Apo-H) is a multifunctional apolipoprotein. One of its functions is to bind cardiolipin. When bound the structure of cardiolipin and Apo-H both undergo large changes in structure. Description: Human serum. Alternative Names: Apo-H protein, beta 2 Glycoprotein 1, Apolipoprotein H, Apo H protein, B2GP protein, beta-2 Glycoprotein 1 protein