The RNA polymerase II subunit Rpb4p mediates decay of a specific class of mRNAs.
Lotan R, Bar-On VG, Harel-Sharvit L, Duek L, Melamed D, Choder M. The RNA polymerase II subunit Rpb4p mediates decay of a specific class of mRNAs. Genes Dev. 2005 Dec 15; 19(24):3004-16.