Intramolecular ionic interactions in ternary amino acid complexes [1]
โ Scribed by Roger Tribolet; Helmut Sigel; Karl Trefzer
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 314 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0020-1693
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๐ SIMILAR VOLUMES
Spectrophotometrlc studies have provided evidence for zinc-mediated ternary complexes between ATP and aromatic ammo acids. The hypochromicity observed in the 260 nm hand of ATP increased in the order phenyl-&nine < tyroslnn < tryptophan. Adding alanlne did not produce any change of the ATP spectrum.
## Abstract The ternary Cu^II^ complexes [Cu(D,Lโphe)(bpy)]ยท(ClO~4~) (1), [Cu(D,Lโphe)(phen)(H~2~O)]ยทClO~4~ยทH~2~O (2), and [Cu(Lโphe)(bpy)(H~2~O)]ยทClO~4~ยทH~2~O (3) (bpy = 2,2โฒโbipyridine, phen = 1,10โphenanthroline) adopt helical structures in the crystal state, as determined by an Xโray structural
## Abstract Formation constants of ternary complexes of Cu^II^ with (__S__)โaminoโacid amides (phenylalaninamide, prolinamide, and tryptophanamide) and (__R__)โ or (__S__)โamino acids (valine, phenylalanine, proline, and tryptophan) were determined potentiometrically at 25ยฐ and __I__ = 0.1M (KC1).