Aminoacids aromatic

In addition, demercuriation reactions have resulted in a wide variety of rather complex compounds including aromatic aminoacids, steroids, imidazols, etc. in good yields (at the tracer level). The driving force in these studies has been the hope of incorporating At into biologically active compounds for therapautic use. 

Bagge P, Larsson C. 1986 Biosynthesis of aromatic aminoacids by highly purified spinach chloroplasts—compartmentation and regulation of the reactions. Physiol Plantarum 68 641-647. 

Aromatic aminoacids Glass DC amperometry End-channel (off-chip) Screen-printed carbon [146]... 

Dl. Dalgliesh, C. E., Unspecific hydroxylation reactions in the metabolism of aromatic aminoacids. Biochem. J. 58, Proc. xiv (1954). 

Composed of aromatic aminoacids Active dye ligands Aromatic ionic interactions... 

Experimental Verification. The changes of capacity factor values k with (3-CD concentration in the mobile phase solution are illustrated in Figure 1 as the behavior of methylphenobarbital enantiomers on RP-18 columns (26). The similar influence of CD on k values was observed for all the studied compounds ( disubstituted benzenes, mandelic acid and its derivatives, some aromatic aminoacids, some barbiturates and hydantoins)(17-19,21-26,28). o(- or -CD additions were always followed by a decrease in the apparent capacity factor (k ) values. These results suggest that the adsorption... 

In the original GOase crystals grown in the presence of acetate at pH 4.5, the copper site has square pyramidal coordination with Tyr 272, His 496, His 581 and an acetate ion as the in-plane ligands and Tyr 495, as a weakly-coordinated axial ligand (Figure 4). The site is rich in aromatic aminoacid side chains. 

One of the more recent applications of carbene insertion into 0-H bond of alcohols includes the synthesis of chorismic (and pseudochoris-mic) acid [81], which occupies in microorganisms and plants, a strategic position in the shikimate pathway [82] as the key branch point intermediate governing the biosynthesis of aromatic aminoacids, isoprenoid qui-nones, bacterial and plant growth regulators, and other vital compounds. 

Balestrieri 1978 2 Aromatic aminoacids in proteins (catalase, RNase, lysozyme) 305... 

Demchenko 1978 2 Aromatic aminoacids in proteins solvent perturbation effect on lysozyme, aldolase, serum albu- ... 

A number of normal and iio-alkyl astatides have been prepared by reaction between the vapor of the analogous alkyl iodide and Ar ion at elevated temperatures. Demer-curiation reactions have produced aromatic aminoacids, steroids, and imidazoles containing astatine. 

Vanossi, D., R. Benassi, E. Parent , E. Tassinari, R. Giovanardi, N. Florini, V. DeRenzi, G. Amaud, and C. Eontanesi. Eunctionalization of glassy carbon surface by means of aliphatic and aromatic aminoacids. An experimental and theoretical integrated approach. Electrochim. Acta 75, 2012 49-55. 

Some of the fluorophores native to cells are NADH, flavins and aromatic aminoacids constituents of proteins (e.g., tryptophan, tyrosine, phenylalanine). Various porphyrins and lipopigments such as ceroids, lipofuscin, which are end products of lipid metabolism, also fluoresce. In addition, some important endogenous fluorophores are present in the extracellular structures of tissues. For example, collagen and elastin, present in the extracellular matrix (ECM), fluoresce as a result of cross-linking between amino acids. The absorption and emission spectra of some endogenous fluorophores are shown in Figure 3 (Katz and Alfano, 2000). 

There continue to be reports of potential prodrugs of biologically-active nucleoside-5 -phosphates. The S-acetyl-2-thioethyl ester 137 of d4T has been prepared, and undergoes esterase hydrolysis in the cell. The same team have also made the analogous derivative of AZT. A series of aromatic aminoacid phosphoramidates of AZT have been described as have bis-ketol AZT monophosphates and 4-acyloxybenzyl bis(nucleosid-5 -yl) phosphates of AZT and ddl. Phosphodi- and tri-esters incorporating both AZT and a metal-com-... 

Emondts and co-workers studied LLS lifetimes for heteronuclear ( C- H) spin pairs at zero magnetic field. In the case of C labelled formic acid, they observed singlet lifetimes of 37 s, about three times longer than the of the dipole polarization of the triplet state. Pravdivtsev et al. studied the LLSs, created by means of photo-chemically induced DNP in P-CH2 protons of aromatic aminoacids. The LLS lifetimes were measured as a function of the magnetic field using the... 

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