six of seven polymorphic serum loci were previously located on two-dimensional gels : alpha-1 antitrypsin ( pi ) , gc-globulin ( gc ) , alpha-2 hs glycoprotein ( hsga ) , alpha-haptoglobin ( hp ) , and two apolipoproteins ( apoe and apoa4 ) .
C0003591
apolipoproteins
C0003595
apoe