From the data , it is apparent that both SsrB activate the transcriptional-fusions to spiC .
The response regulator SsrB , in turn , is autoregulated , activating outside of spiC ssrA ssrB srfH , etc Asp-P SsrB Fig. 1 .
SsrB , in turn , activates spiC .
SsrB , in turn , activates spiC .