The acetylcholine bind to muscarinic receptors on endothelial cells, which activates the enzyme nitric oxide synthase.

乙酰胆碱与内皮细胞上的毒蕈碱受体结合，激活一氧化氮合酶。

So the neuro science project I'm working on involves the cellular signaling pathway of neuronal nitric oxide synthase.

我在做的这个神经学科项目涉及神经元一氧化氮合酶细胞信号传导通路。

The ALAS2 gene is involved in coding for delta ALA synthase.

ALAS2基因参与编码Delta-ALA合酶。

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。

Nitric oxide synthase converts the amino acid arginine into citrulline and nitric oxide.

一氧化氮合酶将氨基酸中的精氨酸转化为瓜氨酸和一氧化氮。

Without Delta-ALA synthase, there's a build up of iron and not enough normal heme production.

若缺乏Delta-ALA合酶，就会导致铁的堆积及正常血红素合成的减少。

It begins in the mitochondria where succinyl CoA binds to glycine via delta-ALA synthase to produce delta-aminolevulinic acid, or ALA.

反应开始于线粒体，琥珀酰CoA通过δ-ALA合成途径，结合甘氨酸以制造δ-氨基乙酰丙酸（ALA）。

Damaged parasympathetic nerve fibers can't release acetylcholine, so there's less nitric oxide synthase activation, and less nitric oxide is produced.

受损的副交感神经纤维不能释放乙酰胆碱，因此被激活的一氧化氮合酶较少，产生的一氧化氮也较少。

Glucose and heme are the treatments for acute intermittent porphyria as they inhibit aminolevulinic acid synthase, the first enzyme involved in heme synthesis.

葡萄糖和血红素用于治疗急性间歇性卟啉病，他们能抑制氨基乙酰丙酸的合成，即影响参与血红素合成的第一种酶。

This happens because low testosterone levels are associated with lower levels of nitric oxide synthase, which causes less nitric oxide to be produced, and less smooth muscle relaxation.

这是因为低睾酮水平与较低水平的一氧化氮合酶有关，低睾酮水平导致一氧化氮产生不足，并减少平滑肌松弛。