>gnl|CDD|29565 cd00619, Terminator_NusB, Transcription termination factor NusB (N protein-Utilization Substance B). NusB plays a key role in the regulation of ribosomal RNA biosynthesis in eubacteria by modulating the efficiency of transcriptional antitermination. NusB along with other Nus factors (NusA, NusE/S10 and NusG) forms the core complex with the boxA element of the nut site of the rRNA operons. These interactions help RNA polymerase to counteract polarity during transcription of rRNA operons and allow stable antitermination. The transcription antitermination system can be appropriated by some bacteriophages such as lambda, which use the system to switch between the lysogenic and lytic modes of phage propagation.. Length = 130

 Score = 90.7 bits (225), Expect = 2e-19
 Identities = 43/141 (30%), Positives = 64/141 (45%), Gaps = 12/141 (8%)

Query: 16  RGIARLAAVQALYQIDIIGCSTTEIISEYETYRFCADTELDVESVYLHVDLEWFRVIIHG 75
           R  AR  AVQALY  ++            E      +             L +   ++ G
Sbjct: 1   RRRARELAVQALYAWEL------APEILAEVVSL-LELLQYKSKK----VLPFALKLVRG 49

Query: 76  VMDRKQHIDLLISSCLTEKWSFSRLDMILCSILRAGVLELIECHSVPVEVIISEYVCIAH 135
           V++  + ID LI   L   WS  RL ++  +ILR  V EL+    VP  V+I+E + +A 
Sbjct: 50  VLENIEEIDELIEKHL-RNWSLDRLAIVERAILRLAVYELLFLPDVPHPVVINEAIELAK 108

Query: 136 DFFYGDEPKFINAVLDKVSRK 156
            F   D  KF+N VLDK+++ 
Sbjct: 109 RFGGDDSHKFVNGVLDKIAKD 129