In most people, a gene called huntingtin or HTT on chromosome 4, contains a triplet repeat, where the nucleotides C, A, and G are repeated 10-35 times in a row.

大多数人体内，位于4号染色体上的HTT基因，有一段三核苷酸重复序列，即核苷酸CAG，连续重复拷贝10-35次。

In some cases, the involved gene contains a triplet repeat where the nucleotides C, A and G are repeated multiple times in a row and since CAG codes for the amino acid glutamine, the encoded protein will have multiple extra glutamines in a row.

在某些情况下，涉及的基因包含一个三联体重复序列，即核苷酸C、A和G连续重复多次；由于CAG编码谷氨酰胺，编码的蛋白质将具有连续多个额外的谷氨酰胺。