Lp(a) is a plasma lipoprotein whose structure and compostion closely resembles that of LDL, but with an additional molecule of apolipoprotein(a) [apo(a)], linked to apoB by a disulfide bond.

• 高脂蛋白(a)[Lipoprotein(a)，Lp(a)]由载脂蛋白(a)[apolipoprotein(a)，apo(a)]和apoB通过二硫键连接而成，其结构、脂肪酸组成和抗氧化剂含量及体外氧化行为均与LDL相似。