Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/3QT1 3QT1: RNA polymerase II variant containing A Chimeric RPB9-C11 subunit DNA-directed RNA polymerase II subunit RPB1DNA-directed RNA polymerase II subunit RPB11DNA-directed RNA polymerase II subunit RPB2DNA-directed RNA polymerase... rna polymeraseiivariant