Table 1.
Concentration of 31P MR phantoms, their chemical shifts (ppm) and coupling constants.
Metabolite | Product Number | Concentration in Phantoms (mM) | Multiplicity | Chemical Shift at pH = 7.0 | Chemical Shift at pH = 7.5 | Chemical Shift In Vivo |
J-Coupling (Hz) |
Basis Set Deelchand | BASISp Set Present Study | |
---|---|---|---|---|---|---|---|---|---|---|
Phosphocreatine | P7936-5G | 1 PCr | 5 | s | 0 | 0 | 0 | - | 0 | 0 |
Inorganic phosphate | Pi | 40 | s | 4.78 | 5.27 | ~5 | - | 4.84 | 4.78 | |
Adenosine triphosphate | A2383-1G | αATP | 10 | d | −7.98 | −7.94 | ~7–8 | 19.5 | −7.56 | −7.53 |
βATP | 10 | t | −18.80 | −18.58 | ~16 | 20.0 | −16.18 | −16.18 | ||
γATP | 10 | d | −4.18 | −3.37 | ~3–4 | 19.0 | −2.53 | −2.7 | ||
Adenosine diphosphate | 29349990900 | αADP | 10 | d | −7.28 | −7.32 | - | 19.0 | - | - |
βADP | 10 | d | −3.50 | −3.20 | - | 19.5 | - | - | ||
Phosphoethanolamine | P0503-1G | PE (PME) | 10 | t | 6.74 | 6.85 | 6.78 | 7.0 | 6.77 | 6.77 |
Phospholcholine | P0378G | PC (PME) | 10 | t | 6.19 | 6.35 | 5.9 | 6.0 | 6.23 | 6.23 |
Glucose 1-phosphate | G1259-1G | G1P | 10 | d | 4.99 | overlay with Pi (5.20) | overlay with PME | 7.5 | - | 4.99 |
Glucose 6-phosphate | G7879-1G | G6P | 10 | t | 7.03 | 7.30 | 7.1–7.2 | 6.1 | - | 7.03 |
Phosphoenolpyruvate | P7127-500MG | PEP (PME) | 10 | s | 2.00 | 2.27 | 2.06 | - | 2 | |
Phosphatidylcholine | PtdC | 3 10 | t | 2.14 | 2.13 | 2.06 | - | 2.14 | ||
Glycerol-3-phosphoryl choline | G5291-100MG | GPC (PDE) | 10 | t | 2.97 | 2.96 | 2.76 | 5.5 | 2.94 | 2.97 |
2.3-diphosphoglycerate | D9134-100MG | 2,3-DPG(PDE) | 2 2 | 2- d | 4.09 | 4.6 | 5.5 | 6.0 | 5.23 | 4.05 |
3- t | 5.338 | 5.84 | 6.3 | 9.5 | 5.71 | 5.32 | ||||
Nicotinamide adenine dinucleotide (reduced form) | N8129-1G | NADH | 10 | s | −8.16 | −8.16 | ~8.1 | −8.13 | −8.13 | |
Nicotinamide adenine dinucleotide (oxygenated form) | 10127981001 | NAD+ | 10 | s | −8.32 | −8.32 | ~8.3 | 6.0 | −8.31 | −8.31 |
Uridine diphosphoglucose | U4625-500MG | UDPG | 2 2 | d | −8.11 | −8.11 | −8.1 | 10.0 | - | −7.98 |
UDPG | 2 2 | d | −9.78 | −9.78 | −9.8 | 10.0 | - | −9.78 | ||
4 Membrane phospholipids | MP | 2.3 | 2.3 | |||||||
4 Glycerophosphoethanolamine | GPE | 3.49 | 3.49 |
1 PCr was used as an internal standard; 2 K2HPO4/NaH2PO4 to c = 10 mM; 3 40% ethanol with the addition of Triton 100 as a surfactant; 4 taken from [15]. s—singlet; d—doublet; t—triplet.