Results 131 to 140 of about 1,913 (163)

Liposomes with polyribonucleotides as model of precellular systems

Origins of life and evolution of the biosphere, 1987
A study of the encapsulation of poly(U) and poly(C) within liposomes made from dipalmitoylphosphatidyl choline (DPPC), from egg yolk phosphatidyl choline (PC), and from PC with cholesterol (CHOL) was made. The liposomes were prepared under anoxic conditions following the reverse-phase evaporation method.
I, Baeza, M, Ibañez, A, Lazcano, C, Santiago, C, Arguello, C, Wong, J, Oró   +6 more
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A Three-stranded Polyribonucleotide Structure

Nature, 1958
THE synthetic polymers, polyadenylic acid (A) and polyuridylic acid (U) interact strongly when mixed together in aqueous solution. Evidence for interaction on mixing comes from many observations, including increases in viscosity, sedimentation coefficient and molecular weight and decrease in ultraviolet absorption1.
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Affinity of human leukocyte interferon for polyribonucleotides

Cell Biology International Reports, 1979
Human leukocyte interferon (HL-IF)binds to AGPOLY(A)TM, AGPOLY(U)TM and AGPOLY(I)TM. The bound interferon could be displaced from all three polyribonucleotides by including sodium chloride in the eluant. The nature of interaction of HL-IF with polyribonucleotides is electrostatic and not hydrophobic since its binding was not prevented in the presence ...
K C, Chadha, P M, Grob
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Ultraviolet Photochemistry as a Probe of Polyribonucleotide Conformation

1972
Publisher Summary This chapter discusses that exposure of nucleic acids to small doses of near-ultraviolet radiation brings chemical changes only in their pyrimidine moieties. The photochemistry of nucleic acids is discussed and analysis is made of the conformational determinants of the photoreactivity of pyrimidine residues.
A J, Lomant, J R, Fresco
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Binding kinetics of mercury(II) to polyribonucleotides

Biochemistry, 1975
Kinetic studies of the interaction of Hg(II) with polyribonucleotides have been used to investigate structural fluctuations of the bases in nucleic acids. The reaction of Hg(II) with poly(A)-poly(U) occurs in two phases which differ in time scale by a factor of about 100.
M N, Williams, D M, Crothers
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Theoretical studies on the interaction of synthetic polyribonucleotides

Biochimica et Biophysica Acta, 1958
Abstract The interaction of polyadenylic acid with polyuridylic acid to form a two-stranded poly (A + U) complex has been studied by comparing experimental observations with the behavior which would be predicted for a number of mechanisms of interaction.
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Complexes of polyoma DNA and synthetic polyribonucleotides

Biochemical and Biophysical Research Communications, 1970
Abstract The complexes formed between polyoma DNA and polyribonucleotides indicate that this DNA contains both cytosine-rich and thymine-rich clusters. Their even distribution precludes strand separation by this method. The pyrimidine-rich clusters cannot be easily correlated with the promotion of the polycistronic transcription of polyoma DNA.
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Stepwise degradation of polyribonucleotides

Biochemistry, 1974
G, Keith, P T, Gilham
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Polyribonucleotide

2023
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polyribonucleotide, n.

2023
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