partial amino acid deprivation of bacillus subtilis , which evokes the stringent response , initiates sporulation not because the highly phosphorylated guanine nucleotides guanosine-5'-diphosphate-3'-diphosphate ( ppgpp ) and guanosine-5'-triphosphate-3'-diphosphate ( pppgpp ) increase but because gtp decreases .
C0018328
guanine
C0018352
guanosine-5