FIG. 9.

Induction of ORF11, ORF12, and tesB in TA441 cells incubated with steroids or aromatic compounds. Cells were collected 4 h after the start of incubation and were subjected to Northern blot analysis with suitable probes (ORF11, ORF12, tesB, and mhpB). mhpB is the gene encoding the meta-cleavage enzyme of TA441 in 3-(3-hydroxyphenyl)propionic acid degradation and was used as a control. Substrates tested were testosterone (Ts), cholic acid (CA), biphenyl (Bp), phenol (Ph), 3-(3-hydroxyphenyl)propionic acid (PP), and succinate (Sc).