Distribution and targets of antisense sRNAs. A. Distribution of antisense sRNAs in the genome of P. aeruginosa PAO1. Each asRNA is marked by a black line. B. Classification of genes showing antisense transcription according to PseudoCap functional classes. Asterisks (*) denote functional classes that are significantly overrepresented (P < 0.05) among the 232 asRNAs.