3.major lipoprotein classes: *chylomicron VLDL IDL LDL HDL 4.the action of lipoprotein in atherosclerosis formation VLDL,LDL,IDL,apoB HDL,apoA 3. major lipoprotein classes: 3. major lipoprotein classes:  chylomicron chylomicron VLDL IDL LDL HDL VLDL IDL LDL HDL  4. the action of lipoprotein in atherosclerosis 4. the action of lipoprotein in atherosclerosis formation formation  VLDL, LDL, IDL, VLDL, LDL, IDL, apoB  HDL, apoA