Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/7ZS8
Cytochrome-c peroxidaseCALCIUM IONHEME CSODIUM ION
cytochrome c peroxidasemixed valenceactive form
https://www.osti.gov/biblio/1879703
mixed valencemanipulatingcoordinationstructurescopper