RNA polymerase omega subunit 99 rpoZ DNA-directed RNA polymerase subunit omega TT_C1196 MAEPGIDKLFGMVDSKYRLTVVVAKRAQQLLRHGFKNTVLEPEERPKMQTLEGLFDDPNAVTWAMKELLTGRLVFGENLVPEDRLQKEMERLYPVEREE RPOZ_THET2 Transcriptase subunit omega Promotes RNA polymerase assembly. Latches the N- and C- terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits (By similarity).