The organizational scheme of these transporters is evidenced in Fig. 1a (blue and gray, respectively) and shows that besides the transporter, the predicted operons encode the TauD ( tauABCD operon) and the two-component system SsuD and SsuE ( ssu operon) for the desulfonation of the organosulfonates such as taurine and alkanesulfonates, respectively.
Source: wiktionary