一个基因的三元关联系统。

Hum Hered. 1977;27(2):114-7. doi: 10.1159/000152859.

A significant association is described between genes of the erythrocyte acid phosphatase (ACP1B), erythrocyte adenosine deaminase (ADA2) and plasma haptoglobin (Hp2) systems. Most of the heterogeneity is shown to reside in the ADA2-Hp2 association and in the ACP1B-Hp2 association among persons of type ADA 1.

红细胞酸性磷酸酶（ACP1B）、红细胞腺苷脱氨酶（ADA2）和血浆触珠蛋白（Hp2）系统的基因之间存在显著关联。大部分异质性表现为ADA1型人群中ADA2 - Hp2关联以及ACP1B - Hp2关联。