Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1ZVI 1ZVI: Rat Neuronal Nitric Oxide Synthase Oxygenase Domain Nitric-oxide synthase, brain5,6,7,8-TETRAHYDROBIOPTERINPROTOPORPHYRIN IX CONTAINING FEZINC ION nitric oxide synthaseratneuronaldomain