## Abstract ^13^C chemical shifts and coupling constants of phosphoserine in aqueous solutions were studied as a function of pH values. Carboxyl and α‐amino titration shifts agree with those observed in amino acids. The analysis of the coupling constants indicates that for rotation about the (C)C
Conformational study of phosphothreonine in aqueous solution. H and 13C NMR results
✍ Scribed by L. Pogliani; D. Ziessow
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 250 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The 270 MHz ^1^H and 22.6 MHz ^13^C NMR spectra of DL‐phosphothreonine in D~2~O have been measured and analysed as a function of pD. The trans‐trans conformation of the fragment H‐αC‐αC‐βOP predominates at all pD values. The C‐β—O gauche contribution is notably larger for pD values in the range 7≤pD<10 than for acidic or more basic solutions which is in accordance with earlier results for phosphoserine (PSer).
📜 SIMILAR VOLUMES
## Abstract The ^1^H NMR spectrum of chlorpromazine hydrochloride was fully assigned at 400 MHz. Similarly, the ^13^C NMR spectrum was assigned unambiguously using two‐dimensional NMR. Measurements of chemical shift as a function of concentration in D~2~O showed appreciable changes of shift of both
## Abstract The 270 MHz n.m.r. spectra of phosphoserine (PSer) have been measured and completely analysed for seven pD values. The resulting vicinal coupling constants ^3^__J__(HαHβ) and ^3^__J__(PHβ) are used to discuss the conformations of PSer with respect to the (Hα)CαCβ(O) and (Cα)CβO(P)
## Abstract Full assignments of the ^1^H and ^13^C NMR spectra of spiramycin l in CDCl~3~ and buffered D~2~O were carried out unambiguously using a range of 1D and 2D NMR methods.
The 1H and 13C NMR spectra of the steroidal neuromuscular blocking drugs pancuronium bromide, vecuronium bromide, rocuronium bromide and Org. 9487 are presented. The 13C NMR spectra are fully assigned. NOE data and variable-temperature studies show that there is considerable conformational freedom i