Circular dichroism studies

Although the total content of carbohydrate fractions of the three components is similar, as reported by Williams et al., 1990, it was found that protein-rich fractions have a significantly lower glucuronic acid content. Circular dichroism studies conducted on different GA fractions showed that only the AGP and GP components have a secondary structure (Renard et al., 2006). The AGP fraction was isolated by gel filtration chromatography and subjected to deglycosylation with hydrofluoric acid (HF) to separate the protein (Qi et al., 1991). About 400 amino acids were contained by the AGP protein fraction ( 33% are... 

Voelter W, Records R, Bunnenberg E, Djerassi C (1968) Magnetic circular dichroism studies, vi. investigation of some purines, pyrimidines, and nucleosides. J Am Chem Soc 90 6163—6170... 

A. Evidence from Circular Dichroism Studies Early CD Studies on Polypeptides... 

CD and ORD measurements are a useful tool in studying configuration and conformation. The configuration of optically active 4,4 -dicarboxy-2,2, 5,5 -tetramethyl-3,3 -biselenienyl (1, X = Se) relative to its thiophene analog (1, X = S), was determined by reducing both to the corresponding 4,4 -dihydroxymethyl derivatives (2), which could be related to each other by the quasi-racemate method and by circular dichroism studies.15 Compounds 1 have also been related to 3,3, 6,6 -tetramethyl-2,2 -diphenic acid (3), and it was found that the levorotatory form of 1 (X = Se, S) and the dextrorotatory form of 3 have the -configuration.16... 

No magnetic circular dichroism studies have been reported during the period covered by this review, and only one study was reported in CHEC-II(1996) <1996CHEC-II(8)345>. 

Dicko, C., Knight, D., Kenney, J. M., and Vollrath, F. (2004c). Structural conformation of Spidroin in solution A synchrotron radiation circular dichroism study. Biomacromo-leculesB, 758—767. 

C. Helene, T. Montenay-Garestier, and J. L. Dimicoli, Interactions of tyrosine and tyramine with nucleic acids and their components. Fluorescence, nuclear magnetic resonance, and circular dichroism studies, Biochim. Biophys. Acta 254, 349-365 (1971). 

F. Culard, M. Schnarr, and J. C. Maurizot, Interaction between the lac operator and the lac repressor headpiece Fluorescence and circular dichroism studies, EMBO J. 1, 1405-1409 (1982). 

Variable-Temperature Magnetic Circular Dichroism Studies of Metalloproteins... 

Circular dichroism studies show that up to 50% of EPO s secondary structure is a-helical. The predicted tertiary structure is that of four anti-parallel helices formed by variable-sized loops, similar to many other haemopoietic growth factors. 

DeAngelis, G.G. and Wildman, W.C., Circular dichroism studies. 1. A quadrant rule for the optically active aromatic chromophore in rigid polycyclic systems. Tetrahedron, 25, 5099, 1969. 

Fourier transform infrared spectroscopy has been used to monitor the Fe(lll)-and Fe(n)-mediated activation of artemisinin 9a <2001JME3150>. Circular dichroism studies on artemisinin 9a and epiartemisinin and their /3-cyclodextrin complexes have been reported <2004HCA2368>. 

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