Nucleotide Interconversions

Nucleotide interconversions. IV. Activities of deoxycytidylate deaminase and thymidylate synthetase in normal rat liver and hepatomas.

Normal and neoplastic rat liver was analyzed for deoxycytidylate deaminase and thymidylate synthetase. For these assays, highly sensitive radiochemical methods capable of detecting the formation of less than 0.001 /~mole of deoxyuridylate and thymidylate were employed. Deoxycytidylate deaminase was found in normal adult rat liver, rat embryo liver, regenerating liver, Novikoff hepatoma, Dunning...

Fatty acid interconversions in lactobacilli.

Dual-controllable stepwise supramolecular interconversions.

A new unsymmetric guest compound comprising ferrocene and azobenzene moieties was synthesized and can form a host-guest system with beta-cyclodextrin (beta-CD) complexed. The complexation stoichiometries and sites of the ensembles can be selectively controlled by reversible redox and photoirradiation.

Conformational interconversions of the cyclic hexapeptide cyclo(Pro-Gly) 3 .

A cyclic hexapeptide, cyclo(Pro-Gly-Pro-Gly-Pro-Gly), has been synthesized; its solution conformations were examined by 220-MHz nuclear magnetic resonance spectroscopy. The solution structures have been deduced, and shown to vary as a function of solvent polarity. In addition, it has been found that this cyclic peptide binds alkali metal cations. While the predominant conformation of this cycli...

Metabolic Interconversions of Different Forms of Vitamin B,*

Tritium-labeled pyridoxamine, pyridoxal S/-phosphate, and pyridoxine 5’-phosphate were prepared and administered intravenously to mice, and the distribution of isotope in liver and carcass between pyridoxine, pyridoxine 5’-phosphate, pyridoxal, pyridoxal S/-phosphate, pyridoxamine, and pyridoxamine 5’-phosphate was determined at different times after administration. The vitamin B6 forms were ex...