Lipoproteins that traffic cholesterol are broadly categorized into two families, defined by apolipoprotein B (apoB) or apolipoprotein A (apoA).

“broadly speaking these lipoproteins traffic in two types of families a family that is defined by apob which is a lipoprotein that wraps around it or an april like the protein that wraps around the spherical larger lipoprotein and apo a there's an apoa family there's an apo b fan technically there is another there's two apob”