The Bacillus subtilis TRAP protein can induce transcription termination in the leader region of the tryptophan biosynthetic (trp) operon independent of the trp attenuator RNA McAdams, N.M.; Gollnick, P. Plos one 9(2): E88097 2014 1932-6203 10.1371/journal.pone.0088097 https://eurekamag.com/research/056/167/056167635.php