There are 8 enzymes in the heme biosynthesis pathway. Mutations in each enzyme can cause porphyria. Therefore there are 8 different kinds of porphyria.
![](https://www.thebloodproject.com/wp-content/uploads/2022/06/HEME_BIOSYNTHESIS-1-699x1024.png)
Oct
7
2021
There are 8 enzymes in the heme biosynthesis pathway. Mutations in each enzyme can cause porphyria. Therefore there are 8 different kinds of porphyria.