Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/5CV6
ThermonucleaseCALCIUM IONTHYMIDINE-3',5'-DIPHOSPHATE
crystal structurestaphylococcal nucleasevariant deltaphs
https://www.ncbi.nlm.nih.gov/Structure/pdb/3T13
Thermonuclease(4R)-2-METHYLPENTANE-2,4-DIOLCALCIUM IONPHOSPHATE ION
crystal structurestaphylococcal nucleasevariant deltaphs
https://www.rcsb.org/structure/3NQT
Crystal structure of Staphylococcal nuclease variant Delta+PHS V66A at cryogenic temperature
crystal structurestaphylococcal nucleasevariant deltarcsbpdb