Two highly polymorphic CA repeats have been identified in the Menkes g
ene (ATP7A). These repeats should be useful for prenatal diagnosis and
carrier detection in families with Menkes disease and X-linked cutis
laxa. The observed heterozygosity for these two repeats was 0.778 and
0.60 in Centre d'Etude du Polymorphisme Humaine (CEPH) families.