Schematic diagram of the stringent response pathway in M. smegmatis activated under nutrient depletion. MprB-P and MprA-P are the phosphorylated forms of MprB and MprA respectively. Poly P serves as the phosphate donor in the conversion of MprB to MprB-P.
Ghosh et al. BMC Systems Biology 2011 5:18 doi:10.1186/1752-0509-5-18