a significant difference between d- ( p ) ppgpp and guanosine 3'-diphosphate 5'-tri- or 5'-diphosphate ( p ) ppgpp ) is that the 3'-pyrophosphate moiety is alkali stable in the deoxyguanosine and alkali labile in the guanosine polyphosphates .
C0034320
pyrophosphate
C0032575
polyphosphates