摘要:
A method for detecting specific nucleic acid sequences (a single sequence and/or a mixture of nucleic acid sequences) which are present in a biological sample, comprising at least one enzymatic amplification. Detection is carried out, after placing the biological samples in a solution in order to extract the nucleic acid, by enrichment with target sequences by putting the biological samples into contact with at least one pair of appropriate triggers, followed by at least one appropriate dilution of the obtained enrichment amplifying solution, and by putting a fraction of this solution into contact with at least one pair of triggers, followed by the detection of the obtained double-strand target nucleic acid copies. Applications in the diagnosis of genetic, infectious and tumoral diseases, in checking biological samples and in cell typing etc.
摘要:
A method for preparing double stranded RNA, wherein the simultaneous transcription of two complementary DNA sequence strands in a single reaction mixture is preformed, and the two resulting transcripts are immediately hybridized. The double stranded RNA fragments may be used for detecting and/or assaying nucleic acid target sequences in a biological sample.
摘要:
A method for preparing a copolymer of general formula (I) by electrochemically copolymerising a compound of general formula (II) with a compound [A], wherein [A] is a monomeric unit of a polymer capable of being produced by electrochemical copolymerisation, [B] is a side group that may be a monomer or a polymer and is bound to unit [A] by a covalent bond or via a spacer arm, and x and y are integers of a least 1. Said method includes a treatment enabling the surface reactivity of said copolymer to be reduced.
摘要:
The invention relates to nucleoside derivatives bearing electrolabile protector groupings and their use in an oligonucleotide synthesis method comprising at least one step of electronic deprotection.
摘要:
A copolymer of general formula (I), ##STR1## wherein unit A is a monomer of an electronically conductive polymer, unit B is a nucleotide, an oligonucleotide or an analogue thereof, x, y, z are integers of 1 or higher or y is 0, and l is a covalent bond, or a spacer arm. Methods for preparing said polymer and its use, in particular for nucleic acid synthesis, sequencing and hybridization, are also disclosed.
摘要:
A copolymer of general formula (I), wherein unit A is a monomer of an electronically conductive polymer, unit B is a nucleotide, an oligonucleotide or an analogue thereof, x, y, z are integers of 1 or higher or y is 0, and 1 is a covalent bond, or a spacer arm. Methods for preparing polymer (I) and its use, in particular for nucleic acid synthesis, sequencing and hybridization, are also disclosed.
摘要:
Process for RNA synthesis consisting in successively condensing necleosides for the formula (1) in which R.sup.1 is a puric pyrimidic optionally protected base, R.sup.2 is a leaving group such as the dimethoxytrityl radical, R.sup.3 is a phosphorus-containing radical, for example, phosphoramidite and R.sup.4 is a trialkylsilyl radical. The RNA obtained is then subjected to a protective treatment with a reagent of the formula (II), for example N(C.sub.2 H.sub.5).sub.3,3HF, to eliminate R.sup.4 protective groups of the 2' hydroxyl groups. Such reagent provides full deprotection in about ten hours, with an RNA of great length, for example, having more than 50 bases.
摘要:
The invention concerns a method for fabricating matrices of addressed ligands on a carrier. According to this method, an element is used such as a reservoir (1) filled with ligand and containing an electrode (3) to deposit and electrochemically fix the ligand to the conductive carrier (7). The ligand may be an oligonucleotide or a peptide, and fixing may be obtained by electropolymerisation of this oligonucleotide or peptide carrying a pyrrole group at 5′ with pyrrole.
摘要:
A method and device for testing an electronic chip (10) having on the surface a plurality of addressable electrically conductive sensitive elements (12) in which the sensitive elements on the chip are put in contact with a conductive solution (52), one or more sensitive elements (12) are addressed selectively in order to apply to each sensitive element addressed an electrical test signal referred to as an input signal, and a signal, referred to as the output signal, on an electrode (60, 60a) also in contact with the conductive solution, is measured.
摘要:
The invention concerns an analysis device including at least one chip (110) equipped with a plurality of analysis electrodes (112). In accordance with the invention, the device also includes means of individual heating (150) of the analysis electrodes. The invention can be used for the analysis of chemical or biological products, for example in an antigen/antibody recognition or DNA/DNA analysis.