Note that porphobilinogen deaminase is sometimes called uroporphyrinogen I synthase or hydroxymethylbilane synthase, or HMBS for short.

卟胆原脱氨酶有时被称为尿卟啉原I合成酶或羟甲基胆素合成酶，缩略为HMBS。

The majority of individuals with the HMBS gene mutation and a deficiency of porphobilinogen deaminase are asymptomatic.

存在HMBS基因突变及缺乏卟胆原脱氨酶的人群大部分没有症状。

Now individuals with acute intermittent porphyria have a mutation of the HMBS gene which codes for the enzyme porphobilinogen deaminase.

急性间歇性卟啉病的患者存在HMBS基因的突变；该基因编码卟胆原脱氨酶。