Nitrogen-15
Appearance
General | |
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Symbol | 15N |
Names | nitrogen-15, 15N, N-15 |
Protons (Z) | 7 |
Neutrons (N) | 8 |
Nuclide data | |
Natural abundance | 0.37% |
Isotope mass | 15.000 108 898 4(9) Da |
Spin | ½ |
Parent isotopes | 15O (β−) |
Isotopes of nitrogen Complete table of nuclides |
Nitrogen-15 is a stable, non-radioactive isotope of nitrogen. It is often used in agricultural and medical research. Nitrogen-15 is frequently used in nuclear magnetic resonance spectroscopy (NMR), because unlike the more abundant nitrogen-14, it has a nuclear spin of ½, which simplifies observation by NMR. Proteins can be isotopical labelled by cultivating them in a medium containing only nitrogen-15. In addition, nitrogen-15 is used to label proteins in quantitative proteomics (e.g. SILAC).
It is a product of oxygen-15 beta decay in stars.