The pea gene NA encodes ent-kaurenoic acid oxidase.

@article{Davidson2003ThePG,
  title={The pea gene NA encodes ent-kaurenoic acid oxidase.},
  author={Sandra E. Davidson and Robert C. Elliott and Chris A. Helliwell and Andrew T. Poole and James B Reid},
  journal={Plant physiology},
  year={2003},
  volume={131 1},
  pages={335-44}
}
The gibberellin (GA)-deficient dwarf na mutant in pea (Pisum sativum) has severely reduced internode elongation, reduced root growth, and decreased leaflet size. However, the seeds develop normally. Two genes, PsKAO1 and PsKAO2, encoding cytochrome P450 monooxygenases of the subfamily CYP88A were isolated. Both PsKAO1 and PsKAO2 had ent-kaurenoic acid oxidase (KAO) activity, catalyzing the three steps of the GA biosynthetic pathway from ent-kaurenoic acid to GA(12) when expressed in yeast… CONTINUE READING