Enzyme	Gene	Reference
4-hydroxybenzoate 3-monooxygenase	Pae_praI	Kasai, D., Fujinami, T., Abe, T., Mase, K., Katayama, Y., Fukuda, M., & Masai, E. (2009). Uncovering the Protocatechuate 2,3-Cleavage Pathway Genes. Journal of Bacteriology, 191(21), 6758–6768. https://doi.org/10.1128/jb.00840-09
protocatechuate 2,3-dioxygenase	-	-
2-hydroxymuconate-6-semialdehyde dehydrogenase	-	-
4-oxalocrotonate tautomerase	-	-
2-oxo-3-hexenedioate decarboxylase	-	-