There was methionin 129 homozygous in the other cases of three groups. codon 129 Val/Val homozygous were not found.

• 结果发现3组中各1例具密码子129多态性，为缬氨酸/甲硫氨酸杂合子，其余均为甲硫氨酸纯合子，无缬氨酸129纯合子。