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I recall reports of an unusual lipoprotein being produced in some hepatic disorders. It has been called LPX (lipoprotein X). I think it is a form of HDL that stacks like rouleaux and migrates backward on lipoprotein electrophoresis. There is mention of this in a large text called LIVER pathobiology and physiology by Raven Press....but I am not in my office right nowand I can not provide the original references. If this sounds promising please let me know and I will forward more information. regards, Andrew