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Helix-helix interactions are important for the folding, stability, and function of membrane proteins. Here, two independent and complementary methods are used to investigate the nature and distribution of amino acids that mediate helix-helix interactions in membrane and soluble α-bundle proteins. The first method characterizes the packing density of individual amino acids in helical proteins based...
The present study explores the mechanism underlying the action of l-arginine on the metabolic activity of spermatozoa. Goat epididymal spermatozoa were incubated with different concentrations of l-arginine to determine its effect on the utilization of glucose, fructose, and pyruvate. NMR techniques have been applied to elucidate the effect of l-arginine, l-lysine, and l-ornithine on the glycolysis...
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