https://www.ncbi.nlm.nih.gov/Structure/pdb/5HC9
5HC9: Thermotoga maritima CCA-adding enzyme complexed with tRNA_CCA
tRNA nucleotidyl transferase-related proteintRNApheMAGNESIUM ION
cca adding enzymethermotoga maritimatrna
https://www.ncbi.nlm.nih.gov/Structure/pdb/3OVA
3OVA: How the CCA-adding Enzyme Selects Adenine over Cytosine in Position 76 of tRNA
CCA-adding enzymeRNA (34-MER)1,2-ETHANEDIOLDIPHOSPHOMETHYLPHOSPHONIC ACID ADENOSYL ESTERMAGNESIUM IONSULFATE ION