https://www.ncbi.nlm.nih.gov/Structure/pdb/4YQW
4YQW: Mutant Human DNA Polymerase Eta Q38A/R61A Inserting dCTP Opposite Template G
DNA (5'-D(*AP*GP*CP*GP*TP*CP*AP*T)-3')DNA (5'-D(*AP*TP*GP*AP*TP*GP*AP*CP*GP*CP*T)-3')DNA polymerase eta2'-DEOXYCYTIDINE-5'-TRIPHOSPHATECALCIUM IONGLYCEROL