Two mutant low-density-lipoprotein receptors in Afrikaners slowly processed to surface forms exhibiting rapid degradation or functional heterogeneity.

Two distinct mutant low-density-lipoprotein receptors in South African Afrikaners exhibit retarded posttranslational processing to mature forms. One mutation gives rise to cell-surface receptors that are subject to abnormally rapid degradation, whereas the other is associated with a functionally heterogeneous surface population degraded at a normal rate.