To test whether the loss of ydgT could overcome the requirement for positive regulation of SPI-2 , we introduced the ydgT deletion into an ssrB mutant lacking the response regulator of the SsrA SsrB two-component regulatory system .
To test whether the loss of ydgT could overcome the requirement for positive regulation of SPI-2 , we introduced the ydgT deletion into an ssrB mutant lacking the response regulator of the SsrA SsrB two-component regulatory system .