the polymorphism of apolipoprotein e ( apo e ) in man is controlled by two codominant alleles , apo e ( n ) and apo e ( d ) , at the apo e-n/d locus and by two alleles , the dominant , apo e4 ( + ) , and the recessive , apo e4 ( o ) , at the apo e4 locus .
C0003595
apo e
C0052201
apo e4