label: Decreased circulating apolipoprotein A-I concentration
label_lc: decreased circulating apolipoprotein a-i concentration
description: "Concentration of apolipoprotein A-I below the lower limit of normal. Apolipoprotein A-I is the major protein component of high density lipoprotein (HDL) in plasma. Defects in this gene are associated with HDL deficiencies, including Tangier disease."