منابع مشابه
Protonated polynucleotide structures. I. The thermal denaturation of polycytidylic acid in acid solution.
Polycytidylic acid is known to form a double-stranded helical structure that is different from either the A or the B form of DNA. X-ray diffraction studies' indicate the structure to be that of a helix similar to that of poly A,2 with the difference being that only one shared proton is bound between the two cytosine residues, this proton forming a third hydrogen bond (Fig. 1). The two protons i...
متن کاملStructures and spectral signatures of protonated water networks in bacteriorhodopsin.
Networks of internal water molecules are thought to provide proton transfer pathways in many enzymatic and photosynthetic reactions. Extremely broad absorption continua observed in recent IR spectroscopic measurements on the photodriven proton pump bacteriorhodopsin (BR) suggest such networks may also serve as proton storage and release sites for these reactions. By combining electronic structu...
متن کاملInduced Polynucleotide Kinase, Polynucleotide Ligase, and Deoxyribonucleic Acid Polymeraset
The mechanism of action of T4-induced polynu-cleotide kinase on short single-stranded deoxyoligonucleotideshas been investigated.It was found that the phosphorylationreaction catalyzed by T, polynucleotide kinase could be re-versed. Thus, a 5 ’-3*P-labeleddeoxyoligonucleotide and ADPon incubation with the enzyme formed [Y-~~PJATP.In addi-tion some radioac...
متن کاملEnzymes of Polynucleotide Metabolism
The latest memoir of the Society for Endocrinology presents the papers and discussions of a 1958 symposium on selected aspects of comparative and human sex morphology. It is gratifying that discussions of bacteria and invertebrate forms are included. Several authors examine the important question of genetic and hormonal controls of sex differentiation. The possibility of regulating the sex rati...
متن کاملEvaluation of ion mobility spectroscopy for determining charge-solvated versus salt-bridge structures of protonated trimers.
The cross sections of five different protonated trimers consisting of two base molecules and trifluoroacetic acid were measured by using ion mobility spectrometry. The gas-phase basicities of these five base molecules span an 8-kcal/mol range. These cross sections are compared with those determined from candidate low-energy salt-bridge and charge-solvated structures identified by using molecula...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1973
ISSN: 0014-2956
DOI: 10.1111/j.1432-1033.1973.tb02751.x