RNA polymerase II termination complex GO:0110103 2018-03-16T18:55:17Z cellular_component A conserved protein complex capable of 5'-3' exoribonuclease activity. It is able to promote RNA polymerase II (RNAPII) transcription termination by degrading pre-mRNA from the newly formed 5' phosphorylated end. In S. cerevisiae, this complex is formed by RAI1 and RAT1; in H. sapiens it is formed by Twi12, Xrn2 and Tan1. kmv TXT complex nuclear protein-containing complex exoribonuclease complex