Hypoalphalipoproteinemia, Primary, 2, Intermediate, also known as hypoalphalipoproteinemia, primary, 2, autosomal dominant, is related to hypoalphalipoproteinemia, primary, 2 and hypoalphalipoproteinemia. An important gene associated with Hypoalphalipoproteinemia, Primary, 2, Intermediate is APOA1 (Apolipoprotein A1). Related phenotypes are decreased hdl cholesterol concentration and decreased circulating apolipoprotein a-i concentration