Sequence alignment between 3po3(I) and UniProt seq P27999 (RPB9_YEAST):

P27999 (RPB9_YEAST): DNA-directed RNA polymerase II subunit RPB9 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 
                 10        20        30        40        50        60        70        80        90       100       110       120  
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MTTFRFCRDCNNMLYPREDKENNRLLFECRTCSYVEEAGSPLVYRHELITNIGETAGVVQDIGSDPTLPRSDRECPKCHSRENVFFQSQQRRKDTSMVLFFVCLSCSHIFTSDQKNKRTQFS
PDB seq: -TTFRFCRDCNNMLYPREDKENNRLLFECRTCSYVEEAGSPLVYRHELITNIGETAGVVQDIGSDPTLPRSDRECPKCHSRENVFFQSQQRRKDTSMVLFFVCLSCSHIFTSDQKNKRTQ--
          --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+  
                 10        20        30        40        50        60        70        80        90       100       110       120