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Many forms of selenium supplement are commercialized. The purpose of this work was to study the bioavailability of one selenium drug, "Granions de Sélénium", as compared with sodium selenite. Each product was labelled with enriched stable isotopes, and by means of gas chromatography/mass spectrometry (GC/MS), the metabolism of the two forms was followed(More)
N-(guanosin-8-yl) acetylaminofluorene (Guo-AAF) was prepared by the reaction of N-acetoxy-N-2-acetylaminofluorene (AAAF) and guanosine. Antibodies to Guo-AAF were elicited in rabbits by immunization with bovine serum albumin-Guo-AAF conjugate. The antibodies were purified by affinity chromatography on a Sepharose-Guo-AAF column. The reactivity of these(More)
We have used fluorescence spectroscopy to investigate the binding of gene 32 protein from bacteriophage T4 to DNA which has been chemically modified with carcinogens or antitumor drugs. This protein exhibits a high specificity for single-stranded nucleic acids and binds more efficiently to DNA modified either with cis-diaminodichloroplatinum(II) or with(More)
The antitumoral derivative cisPt binds to DNA, as do its inactive analogs, trans- and dienPt. Structural damage introduced into DNA after reaction with the Pt derivatives were probed by using the peptide LysTrpLys. This peptide was used for its preferential binding to single-stranded structures (Brun, F., Toulmé, J.J. and Hélène, C. (1975) Biochemistry 14,(More)
The binding of anti poly(I). poly (C) Fab fragments to double or triple stranded polynucletides has been studied by fluorescence. Association constants were deduced from competition experiments. The comparison of the association constants leads to the conclusion that several atoms of the base residues do not interact with the amino acid residues of the(More)
Interactions between antibodies to poly(inosinic acid).poly(cytidylic acid) [poly(I).poly(C)] (or Fab fragments) and double-stranded polynucleotides have been studied by several techniques. In quantitative precipitation tests, the amounts of precipitated antibodies depend upon salt concentration. This effect of salt is reversible. From the comparison of the(More)