apolipoprotein b deficiency apolipoprotein b deficiency apolipoprotein b deficiency is an autosomal dominant disorder resulting from a missense mutation which reduces the affinity of apob-100 for the low-density lipoprotein receptor (ldl receptor). this causes impairments in ldl catabolism, resulting in increased levels of low-density lipoprotein in the blood. the clinical manifestations are similar to diseases produced by mutations of the ldl receptor, such as familial hypercholesterolemia. treatment may include, niacin or statin or ezetimibe.: 534 apolipoprotein b deficiencyother namesfamilial defective apolipoprotein b-100specialtymedical genetics it is also known as "normotriglyceridemic hypobetalipoproteinemia".