In molecular biology, Vibrio cholerae ToxT activated RNAs are small RNAs which are produced by the bacterium Vibrio cholerae. They are regulated by the transcriptional activator ToxT and may play a role in V. cholerae virulence.[1] Two ToxT activated RNAs have been described: TarA (ToxT activated RNA A) and TarB (ToxT activated RNA B).