Nitrogen-15

Encyclopedia : N : NI : NIT : Nitrogen-15

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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 net nuclear spin, which is required for NMR. Proteins can be isotopical labelled by producing them in cells grown on a medium containing only nitrogen-15. This allows determination of the three dimensional structure of a protein by NMR spectroscopy.

It is a product of oxygen-15 beta decay in stars.

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