## Abstract Pyridoxal‐5′‐phosphate amino‐oxy acetate oxime was titrated in water, over the pH range 4–12, and the changes followed using ^13^C NMR. The results were compared to those of analogous Schiff's bases presented in the literature. The chemical shifts and titration curves of the oxime were
1H NMR study of the reaction of ornithine and lysine with pyridoxal-5′-phosphate
✍ Scribed by Antonio Arcelli; Alessandro Bongini; Rolando Budini
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 143 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The composition of the mixture from the reaction of the basic amino acids ornithine or lysine with pyridoxal‐5′‐phosphate was investigated in D~2~O by ^1^H NMR and was found to be dependent on pH, α attack being favoured at acid pH and ω attack in basic solutions.
📜 SIMILAR VOLUMES
## Abstract ^1^H and ^19^F NMR spectra were obtained for six Schiff bases (aldimines) formed by pyridoxal‐5′‐phosphate (PLP) with four fluorinated or their two parent non‐fluorinated α‐amino acids (phenylalanine and α‐aminobutyric acid). p__K__~A~ Values were derived from ^1^H and ^19^F titration c
## Abstract The kinetics of the reaction between pyridoxal 5′‐phosphate (PLP) with carbidopa, hydralazine, and isoniazid, in aqueous solution at variable pH and constant ionic strength of 0.1M was studied spectrophotometrically. The rate constants of formation and hydrolysis of the resulting __Schi
## Abstract Schiff base formation by condensation of pyridoxal phosphate or pyridoxal with octopamine in aqueous or methanolic medium was investigated by ^13^C NMR. Enolimine forms are favoured in methanolic solution, whereas in aqueous solution the predominant ketoenamine forms show a hydrogen bon