Abstract: The invention concerns a method for detecting or locating one or several genes of one or several specific A DNA sequence or one or several molecules reacting with DNA on a B DNA characterised in that it consists in: (a) fixing and combing a certain amount of said B DNA on a combing surface; (b) reacting the product of the B combing with one or several probes, linked with the gene(s) or specific A DNA sequences, or with the molecules capable of reacting with DNA; (c) extracting information corresponding to at least one of the following categories: (1) the position of the probes, (2) the distance between the probes, (3) the size of the probes (the total sum of sizes for quantifying the number of hybridised probes) for determining therefrom the presence, the location and/or the amount of genes or specific A DNA sequences. This method can be used in particular for the diagnosis of genetic diseases.

Abstract: The subject of the present invention is a process for aligning a macromolecule (macromolecules) on the surface S of a support, characterized in that the triple line S/A/B (meniscus) resulting from the contact between a solvent A and the surface S and a medium B is caused to move on the said surface S, the said macromolecules having a part, especially an end, anchored on the surface S, the other part, especially the other end, being in solution in the solvent A.

Abstract: The subject of the present invention is a process for aligning a macromolecule (macromolecules) on the surface S of a support, characterized in that the triple line S/A/B (meniscus) resulting from the contact between a solvent A and the surface S and a medium B is caused to move on the said surface S, the said macromolecules having a part, especially an end, anchored on the surface S, the other part, especially the other end, being in solution in the solvent A. The subject of the present invention is also a process for detecting, measuring the intramolecular distance of, separating and/or assaying a macromolecule in a sample in which a process of alignment according to the invention is used.

Abstract: The present invention pertains to a novel protein complex receptor for HIV retroviruses, namely the “V3 loop HIV receptor”, which consists in the association of three proteins named P95/nucleolin, P40/PHAPII and P30/PHAPI. The invention also concerns peptidic or non peptidic molecules having the ability to alter and/or prevent the binding of the said novel HIV receptor to the HIV retrovirus, specifically to the gp120 glycoprotein of said HIV retrovirus. The invention is also directed to pharmaceutical and diagnostic compositions containing an effective amount of the molecules altering and/or preventing the binding of the HIV retrovirus to the novel HIV receptor as well as to therapeutic or diagnostic methods using such pharmaceutical or diagnostic composition.

Abstract: The invention concerns a method for detecting or locating one or several genes of one or several specific A DNA sequence or one or several molecules reacting with DNA on a B DNA characterized in that it consists in. (a) fixing and combing a certain amount of said B DNA on a combing surface; (b) reacting the product of the B combing with one or several probes, linked with the gene(s) or specific A DNA sequences. or with the molecules capable of reacting with DNA; (c) extracting information corresponding to at least one of the following categories: (1) the position of the probes. (2) the distance between the probes, (3) the size of the probes (the total sum of size quantifying the number of hybridised probes) for determining there from the presence, the location and/or the amount of genes or specific A DNA sequences. This method can be used in particular for the diagnosis of genetic diseases.

Abstract: The subject of the present invention is a process for aligning a macromolecule (macromolecules) on the surface S of a support, characterized in that the triple line S/A/B (meniscus) resulting from the contact between a solvent A and the surface S and a medium B is caused to move on the said surface S, the said macromolecules having a part, especially an end, anchored on the surface S, the other part, especially the other end, being in solution in the solvent A.

Abstract: A process for aligning a macromolecule on the surface S of a support comprises forming a triple line S/A/B (meniscus) resulting from contact between a solvent A and the surface S and a medium B is caused to move on the surface S. The macromolecule has a part, especially an end, anchored on the surface S. The other part, especially the other end, is in solution in the solvent A. A process for detecting, measuring the intramolecular distance of, separating and/or assaying a macromolecule in a sample using the process of alignment is provided.

Abstract: A highly specific surface for biological reactions, which includes a support with at least one essentially compact layer of an organic compound. On the outside of the organic compound layer is an exposed group containing an ethylenic double bond, which has affinity for a molecule with biological activity under certain reaction conditions. The other elements of the organic compound layer are essentially inaccessible to the molecule with biological activity under the reaction conditions.

Abstract: This invention is in the field of lymphadenopathy virus which has been desogmated Human Immunodeficiency Virus Type 1 (HIV-1) This invention relates to a diagnostic means and method to detect the presence of DNA, RNA or antibodies of the lymphadenopathy retrovirus associated with the acquired immune deficiency syndrome or of the lymphadenopathy syndrome by the use of DNA fragments or the peptides encoded by said DNA fragments. The invention further relates to the DNA fragments, vectors comprising them and the proteins expressed.

Abstract: This invention is directed to nucleic acids derived from the pol region of the genome of human immunodeficiency virus type 1 (HIV-1). The nucleic acids are useful as probes for the detection of HIV-1. More particularly, this invention is directed to nucleic acids encoding a pol region of HIV-1 extending from about nucleotide 1856 to about 1906 and extending from about nucleotide 2048 to about nucleotide 2797.

Abstract: The complete nucleotide sequence of a proviral molecular clone of the lymphadenopathy-associated virus, LAV, was ascertained. Recombinant phage clones were isolated from a genomic library of LAV-infected human T-lymphocyte DNA. The insert of recombinant phase .lambda.J19 was sequenced according to the dideoxy chain termination method. In addition to the retroviral structural genes gag, pol, and env, a novel open reading frame (ORF) was identified in the 3' region of the viral genome and designated ORF-R. The ORF-R coding region, which has subsequently been renamed nef, encodes a 206 amino acid protein that slightly overlaps the 3' end of the env gene and the 5' portion of the U3 region of the viral long terminal repeat (LTR). Nucleic acids encoding this protein and the precise amino acid sequence of the Nef are disclosed in this application. These products are useful for the generation of immunological reagents to facilitate the detection of LAV.

Abstract: The invention concerns hybrid cells transformed or transformable by a cloned DNA containing the sequence coding for the antigen HBs. They are characterized in that they contain, on the one hand, at least a part of the genetic heritage of monkey hepatocyte cells and, on the other hand, a genetic marker permitting them to grow in a selective medium or one containing an active principle normally lethal to the VERO cells from which the hybrid is derived, but able to be inactivated by the polypeptide expressed by the said genetic marker.