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Nuclear Magnetic Resonance (NMR): Overview

Nuclear Magnetic Resonance (NMR): Overview

Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...

Atomic Nuclei: Magnetic Resonance

Atomic Nuclei: Magnetic Resonance

The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...

Applications Of NMR In Biology

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...

NMR Spectrometers: Overview

NMR Spectrometers: Overview

NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...

Atomic Nuclei: Nuclear Relaxation Processes

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis. This...

Double Resonance Techniques: Overview

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

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High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy

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Introduction to nuclear magnetic resonance.

C Jones¹, B Mulloy

¹National Institute for Biological Standards and Control, Potters Bar, UK.

Methods in Molecular Biology (Clifton, N.J.)

|March 15, 2011

Summary

This guide introduces nuclear magnetic resonance (NMR) terms for molecular biologists and biochemists. It highlights NMR applications in protein conformation, internal mobility, molecular interactions, complex carbohydrates, and nucleic acids.

Area of Science:

Biochemistry
Molecular Biology
Structural Biology

Background:

Nuclear Magnetic Resonance (NMR) is a powerful technique for elucidating molecular structure and dynamics.
Recent advancements in NMR have significantly expanded its applications in biological sciences.
A need exists for accessible introductions to NMR terminology and applications relevant to specific fields.

Purpose of the Study:

To provide an introductory guide to the terminology used in Nuclear Magnetic Resonance (NMR).
To highlight key applications of NMR relevant to molecular biologists and biochemists.
To serve as a primer for understanding detailed NMR studies on biological macromolecules.

Main Methods:

The guide focuses on the interpretation and application of NMR data rather than theoretical underpinnings.

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Last Updated: Jun 3, 2026

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It selectively covers NMR applications pertinent to the study of proteins, peptides, carbohydrates, and nucleic acids.

Key areas include conformational analysis, internal mobility, and molecular interactions.

Main Results:

NMR is increasingly utilized for determining protein and peptide conformation in solution.
NMR facilitates structural studies on complex carbohydrates and nucleic acids.
Chapter 7 details the use of NMR in studying protein internal mobility and molecular interactions.

Conclusions:

This guide offers essential NMR terminology for researchers in molecular biology and biochemistry.
It underscores the growing importance and diverse applications of NMR in structural biology.
The text serves as a valuable starting point for those engaging with NMR literature in these fields.