Immunogen sequence: AGILFEDIFD VKDIDPEGKK FDRVSRLHCE SESFKMDLIL DVNIQIYPVD LGDKFRLVIA STLYEDGTLD DGEY Highest antigen sequence identity to the following orthologs: Mouse - 100%, Rat - 100%. Eukaryotes produce 3 distinct classes of RNA polymerase, Pol I,