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

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

Lead poisoning has also been shown to denature enzymes important in heme synthesis, like Delta aminolevulinate dehydratase and ferrochelatase, which are important for heme synthesis.

铅中毒同样也被证明会使血红素合成中重要的酶变性，如Delta-氨基乙酰丙酸脱水酶与亚铁螯合酶这一类对血红素合成至关重要的酶。