adenylic acid/leucemie

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Isolation and characterisation of a non-polyadenylated mRNA species with an affinity for poly(adenylic acid) from Friend leukaemia cells.

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Utilizing the technique of poly(A)-Sepharose affinity chromatography, it is possible to isolate a novel class of RNA molecules from polysomes of Friend leukaemia cells. These RNA species display messenger RNA-like behaviour. They are released from polysomes on treatment with EDTA and are able to

The metabolic behaviour of nuclear and cytoplasmic non-polyadenylated RNAs with an affinity for poly(adenylic acid) from Friend murine leukaemia cells.

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Using poly(A)-Sepharose and poly(U)-Sepharose affinity chromatography, various classes of nuclear RNA can be distinguished in Friend leukaemia cells. One of these contains a poly(A) tract (poly(A)+-RNA) and another lacks a poly(A) tract but has an affinity for poly(A)-Sepharose (poly(A)-u+-RNA). The

Adenylic acid-rich sequence in RNAs of Rous sarcoma virus and Rauscher mouse leukaemia virus.

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[Behavior of the enzymes of the salvage pathway of purine bases in leukemia lymphocytes].

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The Authors present a procedure for the determination of adenine phosphoribosyltransferase (APRT) and hypoxanthine phosphoribosyltransferase (HPRT) in lymphocytes which exhibits high sensitivity and requires low quantities of lymphocytes. 5 normal subjects and 4 patients affected by chronic

Isolation and cell-free translation of messenger ribonucleic acids specifying thymus-leukemia antigens.

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Messenger ribonucleic acid (mRNA) for thymus-leukemia antigens, membrane-associated glycoproteins of murine leukemia cells, was obtained from polysomes of murine leukemia cells forming thymus-leukemia antigens. Polysomes forming thymus-leukemia antigens were recovered by immunoprecipitation using

Effects of polyadenylic acids on functions of murine RNA tumor viruses.

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Single-stranded polyribonucleotides, which competitively inhibit murine RNA tumor virus reverse transcriptase in vitro, were tested as inhibitors of various virus functions in cell culture. The compounds had two concentration-dependent effects. At high concentrations (100 mug/ml), both poly(adenylic

Modified nucleotide polymers as inhibitors of DNA polymerases.

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We have compared the relative inhibitory activity of poly (A) with its analogues poly N6-isopentenyl adenylic acid (poly(i6 A)) and poly N6-benzyl adenylic acid (poly(bzl6A)), and of poly (U) with its analogue poly 2'-fluoro-2'-deoxyuridylic acid (poly(dUfl)), against DNA polymerase, alpha, beta and

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