Nuclear magnetic resonance structural studies

Yu L, Sun C, Song D, Shen J, Xu N, Gunasekera A, HajdukPJ, Olejniczak ET (2005) Nuclear magnetic resonance structural studies of a potassium channel-charybdotoxin complex. Biochemistry 44 15834-15841... 

A.E. Lozano, J.G. de la Campa, J. de Abajo, J. Preston, Aromatic polyamides with benzo-thiazole pendent groups synthesis, nuclear magnetic resonance structural study and evaluation of properties. Polymer 35 (4) (1994) 872-877. 

H. Oudadesse, A.C. Derrien, M. Lefloch, Infrared and nuclear magnetic resonance structural studies vs. thermal treatment of geopolymers/biphasic calcium phosphates, J. Therm. Anal. Calorim. 82 (2005) 323-329. 

Chen, J., Dupradeau, R Y., Case, D. A., Turner, C. J., Stubbe, J. (2007). Nuclear magnetic resonance structural studies and molecular modeling of duplex DNA containing normal and 4 -oxidized abasic sites. Biochemistry, 46, 3096. 

A recent nuclear magnetic resonance (NMR) study of the structure of 2,3,4,5-tetramethyl, 2,3,4- and 2,3,5-trimethyl, and 2,4-dimethyI-pyrrolium ions in concentrated HCl has shown that they are all protonated on the -carbon and are thus of type (13)... 

Greenfield, N. J., Montelione, G. T., Farid, R. S., and Hitchcock-DeGregori, S. E. (1998). The structure of the N-terminus of striated muscle a-tropomyosin in a chimeric peptide Nuclear magnetic resonance structure and circular dichroism studies. 

X-Ray structural determinations and nuclear magnetic resonance (NMR) studies have become versatile tools in the elucidation of the structure of the five-membered metallacycles. Structural and NMR patterns are comprehensively outlined in CHEC-II(1996) <1996CHEC-II(2)933>. Herein we occasionally refer when necessary to the results of structural studies in the reactivity and synthetic sections. 

The chemical composition of PCS is reported to be SiCj 77H3joOo.oss- The molecular structure of PCS is, however, difficult to represent precisely. Si nuclear magnetic resonance (NMR) studies indicate that the PCS structure is represented by three simple units. These are silicon bonded to four carbon atoms (SiC4), silicon bonded to three carbon atoms (SiCjH), and silicon bonded to x carbon atoms and 4-x silicon atoms (SiC Si4, x = 1, 2, or 3). In a typical PCS synthesized without catalysts, SiC4 and SiCjH units are dominant, with the... 

The following discussion will first address the interaction of the nucleophilic serine with the histidine. In the X-ray structures of most serine proteinases, the hydrogen bond between the His Ne2 and Ser Qy is fairly long and therefore appears to be weak [for a discussion of this, see Read and James (1988)]. Early on, these observations led Matthews et al. (1977) to question even the existence of this bond. Nuclear magnetic resonance (NMR) studies (Smith et al., 1989) carried out in solu-... 

The first nuclear magnetic resonance (NMR) studies of T3 failed to isolate two distinct spectra for the distal and proximal conformers (8). In addition, molecular orbital (MO) calculations predicted a high barrier to internal rotation about the diphenyl ether bonds (j)). These data suggested that there was only one conformer present in solution, presumably distal, since this was shown to be the active form of the hormone. However, the first crystal structure of T3 showed the 3 -I conformation to be proximal (10), inconsistent with available binding and activity data. 

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