Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1PM2 1PM2: CRYSTAL STRUCTURE OF MANGANESE SUBSTITUTED R2-D84E (D84E MUTANT OF THE R2 SUBUNIT OF E. COLI... Ribonucleoside-diphosphate reductase 1 beta chainMANGANESE (II) IONMERCURY (II) ION