Further study of South Asians has shown that mutations in two other genes, GNPTG andNAGPA, are found in individuals who stutter, but not in non-stutterers.
对南亚人的进一步研究表明,另两大基因也存在突变GNPTG 和 NAGPA,在口吃者中发现了这两种基因,而非口吃者中没有。
All three affected genes encode enzymes that regulate lysosomes, the cell swaste-disposal units.
所有这三种受影响的基因通过编码酶调节溶解体,溶解体是细胞废物处理单元。
Two of the encode mutations involved are also known to cause a rare disease calledmucolipidosis.
其中有两种编码突变也会引发粘脂沉积症一种罕见的疾病。
Severe mucolipidosis is fatal within ten years of birth.
在出生的十年内,严重的粘脂沉积症是致命的。
Even the mild variety has symptoms that include abnormal skeletal development and,sometimes, slight mental retardation.
即使是温和一点的,也会引发许多症状,包括骨骼发育异常,有时还会有轻度精神发育迟滞。
Fortunately for stutterers, close examination of those with the relevant mutations reveals nosymptoms of mucolipidosis.
在对相关突变进行仔细检查后,并没有发现任何粘脂沉积症的症状,这对口吃者来说是幸运的。
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