Results 61 to 70 of about 4,157 (168)

ESR and optical absorption studies on the copper(II) interaction with small peptides containing aromatic amino acids.

, 1977
The interaction of Cu(II) with di- and tripeptides each containing phenylalanine, tryptophan or histidine in the amino acid chain has been investigated by means of electron spin resonance (ESR) and optical absorption spectroscopy.
Lohmann, W., Sportelli, L., Neubacher, H.   +2 more
core   +1 more source

Estudos dos equilibrios de formação de complexos ternarios formados entre o 1,4,7,13,16,19 - hexaza - 10,22 - dioxaciclotetracosano (OBISDIEN) e os sistemas Cu (II) - dipeptideos e Zn (II) - dipeptideos. Hidrolise e deuteração da glicilglicina [PDF]

, 1996
Tese (Doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Os equilíbrios do OBISDIEN (1,4,7,13,16,19-hexaza-10,22-dioxaciclotetracosano), em presença e ausência dos íons metálicos cobre(II) e zinco(II), e dos ...
Luiz, Marilde Terezinha Bordignon
core  

Theoretical Study of the Catalysis of Cyanohydrin Formation by the Cyclic Dipeptide Catalyst cyclo[(S)-His-(S)-Phe]

, 2016
Dipeptide cyclo[(S)-His-(S)-Phe] 1, first applied by Inoue et al. in 1981, catalyzes the hydrocyanation of aromatic aldehydes very efficiently. Enantioselective autoinduction has also been reported for the process. We have employed QM (density functional
Franziska Schoenebeck (1266411), K. N. Houk (1247004)   +1 more
core   +1 more source

A study of methionine dipeptide stationary phase for gas chromatographic resolution of amino acid enantiomers

, 1975
The synthesis of N-trifluoroacetyl-L-methionyl-L-methionine cyclohexyl ester has been successfully completed. A new method has been used to synthesize the dipeptide stationary phases.
Andrawes, Fikry F.
core  

Aminoacid-derived mercaptoimidazoles

, 2009
International audienceStarting from suitably protected aminoacids, mercaptoimidazoles were synthesized either from the acid or including the amine nitrogen itself.
Bischoff, Laurent, Wattier, Nicolas, Fruit, Corinne, Marsais, Francis, Crépin, Alain, Petit, Sylvain   +5 more
core   +1 more source

Carbonic Anhydrase Activators: Synthesis of High Affinity Isozymes I, II and IV Activators, Derivatives of 4-(4-Tosylureido-Amino Acyl)Ethyl-1H-Imidazole (Histamine Derivatives)

, 2000
International audienceReaction of histamine (Hst) with tetrabromophthalic anhydride and protection of its imidazole moiety with tritylsulfeiiyl chloride, followed by hydrazinolysis, afforded N-1-tritylsulfenyl histamine, a key intermediate which was ...
Andrea Scozzafava, Bogdan Iorga, Claudiu T. Supuran, Scozzafava, Andrea, Iorga, Bogdan, Supuran, Claudiu, T.   +5 more
core   +1 more source

DNA — Oligopeptid wechselwirkung. NMR-untersuchungen zur spezifität der oligopeptid-bindung

, 1972
The specific broadening of 1H-NMR lines caused by the binding of a small molecule to a biopolymer is used for the study of the oligopeptide—DNA interaction. In the NMR spectra of both the dipeptide carnosine (β-alanyl—histidine) and the tripeptide glycyl—
H. Fritzsche, Fritzsche, H.
core   +1 more source

The p-methoxybenzyl ester group in peptide synthesis

, 1968
p-Methoxybenzyl esters of protected amino acids and peptides have been prepared by imidazole-promoted condensation of the corresponding p-nitrophenyl esters with p-methoxybenzyl alcohol.
FHC Stewart
core   +1 more source

Ring-opening polymerization in carnosine under pressure

, 2012
Our high pressure Raman scattering experiments on carnosine, a dipeptide of l-histidine and β-alanine, show pressure induced ring-opening polymerization involving the imidazole ring.
Murli, Chitra, Sharma, Surinder M., Mishra, A. K., Thomas, Susy   +3 more
core   +1 more source

Determining gas-phase chelation of zinc, cadmium, and copper cations with HisHis dipeptide using action spectroscopy and theoretical calculations [PDF]

Using light generated by an infrared free electron laser, action spectroscopy was performed on doubly charged complexes of the metalated dipeptide histidyl-histidine (HisHis). Metal cations used were zinc, cadmium, and copper.
Giel Berden, Brandon C. Stevenson, P.B. Armentrout, Stevenson, B.C., Armentrout, P.B., Jonathan Martens, Berden, G., Jos Oomens, Oomens, J., Martens, J.   +9 more
core   +1 more source