A new polymorphism has been identified in the gene for the dopamine D-
2 receptor. The polymorphism was found by single-stranded conformation
al polymorphism (SSCP) analysis. Sequencing revealed an insertion at a
BsoF1 restriction site. This polymorphism in the 3'-untranslated regi
on was found at a frequency of 0.07 in Centre d'Etude du Polymorphisme
Humain (CEPH) parents.