A saturable binding site for high density lipoprotein3 on human liver membranes

The binding of High Density Lipoprotein3 (HDL) to human liver membranes obtained from male normolipemic subjects was studied. High Density Lipoprotein3 binds in a specific, saturable manner to liver membranes; furthermore, this binding site appears to be distinct from these previously described for Low Density Lipoprotein (LDL) and chylomicron remnants. Competition experiments using Apo A-I reconstituted lipoproteins suggest that Apo A-I could be the determinant of the binding.