Then, in the cytosol, delta-aminolevulinic acid is converted to porphobilinogen, or PBG, via delta-ALA dehydratase.

随后，在细胞，δ-基乙酰丙酸转化为卟胆原，即PBG通过δ-ALA脱氢酶催化。

The process of heme synthesis happens both within the mitochondria and the cytosol of a cell and requires multiple enzymes to catalyze the numerous steps.

血红素的合成过程发生在线粒体和细胞，并且需酶来催化其众的步骤。

The process of heme synthesis occurs both within the mitochondria and the cytosol of a cell and requires multiple enzymes to catalyze the numerous steps.

血红素合成过程发生在线粒体以及细胞液内，需酶催化步反应。

They have no cytoplasmic membrane, cytosol, or functional organelles, but they can infect all types of cells and numerous viruses can also infect bacteria, which are called bacteriophages.

虽然没有细胞膜、细胞和功能性细胞器，但它们可以感染所有类型的细胞；许病毒也能感染细菌，这类病毒也被称为噬菌体。

Type 2 autoimmune hepatitis is way less common, and is defined by the presence of antibodies to the microsomes of the liver or your kidney, ALKM-1, or to a liver cytosol antigen, ALC-1.

2型自免肝更加罕见，它的定义是机体存在肝脏或肾脏微粒体抗体ALKM-1，或者抗肝细胞溶胶抗原抗体ALC-1。