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Nuclear Magnetic Resonance experiments can have multiple variations added, such as form of solvent suppression, sensitivity enhancement, form of inversion or soft pulses, decoupling schemes and so on. This list refers to the basic form of the experiment and references, in general, but not always, are made to the earliest published form of the experiment.
These experiments have been separated into those generally used for solution Nuclear Magnetic Resonance (NMR) spectroscopy, magnetic resonance imaging spectroscopy (MRI) and solid-state NMR spectroscopy.
| Atom Name | Description |
|---|---|
| C | alpha carbon of current amino acid |
| C | alpha carbon of the previous amino acid |
| C | beta carbon of current amino acid |
| C | beta carbon of the previous amino acid |
| CO | carbonyl carbon of the current amino acid |
| CO-1 | carbonyl carbon of the previous amino acid |
| C | any carbon of the previous amino acid |
| H | alpha proton of current amino acid |
| H | alpha proton of the previous amino acid |
| HN | amide proton |
| NH | amide nitrogen |
| H | any proton of the current amino acid |
| H | any proton of the previous amino acid |
| NMR Experiment Name | Atoms Observed | Common Use | Weaknesses | Reference(s) |
|---|---|---|---|---|
| APT | 13C | separate C, CH, CH2 and CH3 | carbon detection | Patt & Schoolery [1] |
| BEST | Decoupling scheme | Excellent Decoupling scheme | none | Zhang & Gorenstein[2] |
| BIRD | Decoupling scheme | BIlinear Rotation Decoupling | - | Garbow, Weitekamp & Pines[3] |
| CBCA(CO)NH | HN, NH, C, C | Protein NMR assignments | Hn exchange | Grzesiek & Bax [4] |
| CBCANH | HN, NH, C, C, C, C | Protein NMR assignments | Hn exchange | Grzesiek & Bax [5] |
| CHIRP | Adiabatic Decoupling scheme | linear for wide sweep width | See Kupce & Freeman[6] and references therein | |
| COSY | Hi, Hi-1, Hi+1 | Correlate neighboring protons | signal overlap | Aue et al[7] and Bax and Freeman[8] |
| COLOC | 1H & 13C | COrrleation via LOng-range Coupling | - | Kessler et al.[9] |
| DEPT (13C-DEPT) | 13C | Differentiate CH, CH2 and CH3 | don't observe quaternary 13C | Bendall, Doddrell & Pegg [10] |
| DIPSI | Decoupling/Spin-lock scheme | decoupling or TOCSY | Shaka, Lee & Pines [11] | |
| Double WURST | Decoupling scheme | Removes Bloch-Seigert Shifts | Zhang & Gorenstein [12] | |
| DQF-COSY | see COSY | Reduces diagonal peaks | - | Piantini, Sorensen & Ernst [13] |
| GARP | Decoupling scheme | Better than MLEV & WALTZ | worse than adiabatic (WURST) | Shaka, Barker & Freeman [14] |
| HACAHB | H, C, H | Selective COSY | water signal overlaps some H | Grzesiek et al. [15] |
| HBHA(CO)NH | HN, NH, H, H | Previous alpha/beta protons | Hn exchange | Grzesiek & Bax [16] |
| HBCBCACOCAHA | H, C, C, CO | Protein NMR assignments | 13C relaxation | Lewis Kay [17] |
| HBCBCACONNH | H, C, C, NH+1, HN+1 | Protein NMR Assignments | Hn exchange | Grzesiek and Bax [4] |
| (HB)CB(CGCD)HD | C and H of aromatic residues | Protein NMR Assignments | 13C relaxation | Yamazaki, Forman-Kay & Kay [18] |
| (HB)CB(CGCDCE)HE | C and H of aromatic residues | Protein NMR Assignments | 13C relaxation | Yamazaki, Forman-Kay & Kay [18] |
| (HCA)CO(CA)NH | HN, NH, CO, CO-1 | Protein NMR assignments | Hn exchange | Lohr and Ruterjans[19] |
| HCACOCAN | CO, C, H, HN, HN+1, NH, NH+1 | Protein NMR assignments | Hn exchange | Lohr and Ruterjans [19] |
| HCAN | H, C, NH, NH+1 | Protein NMR Assignments | water signal overlap | Powers et al. [20] |
| HCCH_TOCSY | (Hi-Ci) ---> H | Assign entire spin systems | signal overlap, 13C relaxation | Clore & Gronenborn [21] |
| H(CCO)NH | HN, NH, H | Proteins: correlate proton spin system to next amide group | Hn exchange | Grzesiek, Anglister & Bax [22] |
| (H)C(CO)NH | HN, NH, Cx-1 | Proteins: correlate carbon spin system to next amide group | Hn exchange | Grzesiek, Anglister & Bax [22] |
| HETCOR | Hi, Ci | similar to HSQC | carbon detection | - |
| HMBC | Hi, Cj,k,l,m | long-range C-H correlations, aromatic ring assignments | low signal, weak J couplings used | Bax & Summers [23] |
| HMQC | Hi, Ci | heteronuclear multiple quantum coherence | - | L. Mueller[24] |
| HNCA | HN, NH, C, C | Sequential alpha carbons | weak Ca-1, Hn exchange | Kay, Ikura, Tschudin & Bax [25] |
| HNCACB | HN, NH, C, C, C, C | Sequential alpha/beta carbons | weak C,C signals, Hn exchange | Wittekind & Mueller [26] |
| HN(CA)CO | HN, NH, CO, CO-1 | Sequential carbonyl carbons | weak CO-1 signals, Hn exchange | Yamazaki, Lee, et al. [27] |
| HN(CA)HA | HN, NH, H, H | Sequential alpha protons | H overlap and water signals | Kay et al. [28] |
| HN(C)N | HN,NH, NH-1 | Amide to previous nitrogen | Hn exchange | Panchal, Bhavesh & Hosur [29] |
| HN(CA)NNH | NH, HN, NH-1, NH+1 | Sequential Protein amide groups | 13C relaxation, HN exchange | Weisemann, Ruterjans & Bermel [30] |
| H(NCA)NNH | NH, HN, HN-1,HN+1 | Sequential Protein amide groups | weak CO-1 signals, Hn exchange | Weisemann, Ruterjans & Bermel[30] |
| HNCO | HN, NH, CO-1 | Carbonyl carbon assignments | Hn exchange | Ikura, Kay & Bax [31] |
| HN(CO)CA | HN, NH, C | Assign previous alpha carbon | Hn exchange | Yamazaki, Lee, et al.[27] |
| HN(CO)CACB | HN, NH, C, C | Previous alpha/beta carbons | Hn exchange | - |
| HN(COCA)CB | HN, NH, C | Previous beta carbons | Hn exchange | Wittekind & Mueller [26] |
| (HN)CO(CO)NH | HN, NH, CO, CO-1 | Previous alpha/beta carbons | C relaxation | Bax & Grzesiek[32] |
| HN(CO)HA | HN, NH, H | Previous alpha proton | Hn exchange | - |
| HN(CO)HB | HN, NH, H | CO-H coupling | Hn exchange | Grzesiek, Ikura et al. [33] |
| HNHA | HN, NH, H | alpha protons & -backbone angles | water peak | Vuister & Bax [34] |
| HNHB | HN, NH, H, H | (N-H J-coupling) | Hn exchange | Archer et al. [35] |
| HNH | HN(i,i-1,i+1), NH(i,i-1,i+1) | Sequential beta protons & backbone angles | weak Ca/Cb-1 signals, Hn exchange | - |
| HNN | HN,NH, NH-1, NH+1 | Amide to sequential nitrogens | Hn exchange | Panchal, Bhavesh & Hosur [29] |
| HSQC | Hi, Xi | Correlate heteroatom and attached proton | very sensitive | Bodenhausen & Ruben,[36]John, et al.[37] & Kay et al.[38] |
| INADEQUATE | incredible natural abundance double quantum transfer experiment | - | - | Bax, Freeman & Frenkiel[39] |
| INEPT | insensitive nuclei enhanced by polarization transfer | part of many modern NMR expts. | - | Morris & Freeman[40] |
| LRCC | Methionine C/H---> C and C | Assign Methionine methyls, chi3 angles | high sensitivity | Bax, Delaglio et al.[41] |
| LRCH | Methionine C/H---> H | Assign Methionine methyls, chi3 angles | high sensitivity | Bax, Delaglio et al.[41] |
| MLEV | 1rst Decoupling scheme | removes J coupling | sensitive to phase imperfections | Levitt, Freeman & Frenkiel[42] |
| NOESY | Hi, Hx | 1H-1H distance | structure determinations | Jeener et al.,[43] Kumar, Ernst & Wuthrich[44] and Macura & Ernst[45] |
| ROESY | Hi, Hx | 1H-1H distance | rotating frame, works for small molecules | Bothner-By et al.[46] and Hwang & Shaka[47][48] |
| TOCSY | Hi----> H | Assign entire H1 spin systems | signal overlap | Braunschweiler & Ernst, [49] and Bax & Davis[50] |
| WALTZ | Decoupling scheme | weak on the edges | A.J. Shaka et al. [51],[52] | |
| WATERGATE | Protons | Solvent suppression | - | Piotto, Saudek & Sklenar [53] |
| WURST | Decoupling scheme | See Kupce & Freeman[54] and references therein |
| MRI Experiment Name | Full Name | Common Use | Reference(s) |
|---|---|---|---|
| BOLD (BOLD-fMRI) | Blood Level Oxygen Dependent | a technique more than a sequence | Turner et al. [55] |
| CSSI | Chemical Shift Selective Imaging (or MRS) | Selective Excitation | |
| DIFRAD | Diffusion-weighted Radial Acquisition of Data | [56] | |
| EPI | Echo Planar Imaging | functional brain imaging | |
| FLASH | Fast Low Angle Shot Imaging | fast functional imaging | |
| GRE | Gradient Echo Imaging | improved MRI | |
| Spin Echo | or Spin Warp | Basic MRI | |
| STEAM | Stimulated Echo Imaging | - |
Many solid state experiments are similar to the liquid state experiments, but the sample is spun off axis at the "magic angle". Thus, many of the experiments listed under the solution NMR section can be done in the solid, and have names like MAS-HSQC, MAS-NOESY and so on.
| Solid State Experiment Name | Full Name | Common Use | Reference(s) |
|---|---|---|---|
| CRAMPS | Combined Rotation And Multiple Pulse Spectroscopy | - | |
| HRMAS | High Resolution Magic Angle Spinning | a part of many experiments | |
| MAS | Magic Angle Spinning | a part of many experiments | |
| REDOR | Rotational Echo Double Resonance | - | |
| XPOLAR | Cross Polarization | Pines, Gibby & Waugh[57] |