| AjPPK2 | Acinetobacter johnsonii PPK2 |
| AMP-PCP | β,γ-methylene adenosine 5ʹ-triphosphate |
| AMP-PCPPP | β,γ-methylene adenosine 5ʹ-pentaphosphate |
| AP4 | adenosine tetraphosphate |
| ChPPK2 | Cytophaga hutchinsonii PPK2 |
| DrPPK2 | Deinococcus radiodurans PPK2 |
| FtPPK2 | Francisella tularensis PPK2 |
| G4P | guanosine 5′-tetraphosphate |
| IC50 | half-maximal inhibition constant |
| Km | Michaelis constant |
| MBP | maltose binding protein |
| MrPPK2 | Meiothermus ruber PPK2 |
| Ndk | nucleoside diphosphate kinase |
| PAP | polyP-AMP phosphotransferase |
| Pi | inorganic phosphate |
| polyP | polyphosphate |
| ppGpp | guanosine tetraphosphate |
| PPK | polyphosphate kinase |
| SmPPK2 | Sinorhizobium meliloti PPK2 |
| Vmax | maximum enzyme velocity |