“Amount of guanosine-5'-triphosphate, 3'-diphosphate (pppGpp) and guanosine-5'-diphosphate, 3'-diphosphate (ppGpp) in the cells of b. subtilis increased several … starvation for lysine or after treatment with serine hydroxamate (analog of serine) or norvaline (analog of leucine), or in the presence of trimethoprim , which … of methionine ….”