Abstract: Chimeric retroviral vectors were constructed containing the long terminal repeats (LTRs) from a simple retrovirus (e.g. spleen necrosis virus (SNV); murine leukemia virus (MLV)) devoid of the integration site (att) and more complex retroviral (e.g. bovine leukemia virus (BLV); human immunodeficiency virus (HIV)) cis-acting regulatory sequences (e.g. att; primer binding site (PBS); encapsidation site (E), and polypurine tract (ppt)) and coding regions. Cells transfected with these constructs produce replication competent retrovirus particles. These retroviral particles provide a source of viral antigens that can be employed in both diagnostic assays and as immunogens for the production of high-titer specific antisera.

Abstract: The present invention provides a process of targeting folate-receptor-positive tumor cells for lysis by binding a conjugate of folate and an anti-T-cell-receptor antibody or an anti-Fc receptor antibody to those cells. A process of lysing folate-receptor-positive tumor cells comprising exposing the cells to a folate/anti-T-cell-receptor antibody in the presence of a population of T-cells is also provided. A process of lysing folate-receptor-positive tumor cells comprising exposing the cells to a folate/anti-Fc receptor antibody in the presence of a population of natural killer cells, monocytes, or macrophages is also provided. Still further, the present invention provides a conjugate of folate to an anti-T-cell-receptor antibody or an anti-Fc receptor antibody.

Abstract: An avian/mammalian microcell hybrid immortalized pre B cell line containing a mammalian chromosome that carries a selectable marker has been produced. The avian/mammalian microcell hybrid immortalized pre B cell line can be used for introducing predetermined point mutations into specific mammalian chromosomal loci via high frequency homologous recombination.

Abstract: The invention pertains to a single polypeptide chain binding molecule which has binding specificity and affinity substantially similar to the binding specificity and affinity of the light and heavy chain aggregate variable region of an antibody, to genetic sequences coding therefor, and to recombinant DNA methods of producing such molecule and uses for such molecule.

Abstract: The invention relates to the identification of complexes of human leukocyte antigen molecules and tyrosinase derived peptides on the surfaces of abnormal cells. The therapeutic and diagnostic ramifications of this observation are the subject of the invention.

Abstract: Small organometallic probes comprise a core of metal atoms bonded to organic moieties. The metal atoms are gold, silver, platinum, palladium, or combinations thereof. In one embodiment, a multifunctional organometallic probe comprises a core of metal atoms surrounded by a shell of organic moieties covalently attached to the metal atoms, a fluorescent molecule, e.g., fluorescein, covalently attached to one of the organic moieties, and a targeting molecule, e.g., an antibody, covalently attached to another of the organic moieties.

Abstract: The invention relates to the identification of complexes of human leukocyte antigen molecules and tyrosinase derived peptides on the surfaces of abnormal cells. The therapeutic and diagnostic ramifications of this observation are the subject of the invention.

Abstract: The invention pertains to a single polypeptide chain binding molecule which has binding specificity and affinity substantially similar to the binding specificity and affinity of the light and heavy chain aggregate variable region of an antibody, to genetic sequences coding therefor, and to recombinant DNA methods of producing such molecule and uses for such molecule.

Abstract: The sequence of the protein coding regions of the bcl-2 gene are provided as well as bacterial clones which produce the proteins. Assays are provided for detecting a class of B-cell neoplasms associated with a chromosome translocation between chromosomes 14 and 18. This translocation is involved in the majority of cases of human follicular lymphomas. One assay employs an antibody which is immunoreactive with a human protein which is over-expressed due to the chromosome translocation. Another assay involves measurement of the amount of mRNA which hybridizes to the gene proximal to the translocation break-point.

Abstract: New purified mite allergens useful as pharmaceutical and diagnostic compositions for the treatment and diagnosis of mite allergic diseases are provided. Both allergens are contained in fecal extracts of mites in culture. The high molecular weight allergen has a weight average molecular weight of 70,000 to 80,000 as determined by sedimentation equilibrium. This is a glycoprotein containing more than about 70% sugar, and possesses allergen activity. The low molecular weight antigen has a molecular weight of 1,500 to 5,000 as determined by Sephadex G25 gel filtration. This is a glycoprotein containing more than about 40% sugar, and also possesses allergen activity.

Abstract: Mammalian red blood cells are used to safely and rapidly neutralize and/or clear antigens or immunogens from the circulatory system by binding to the RBC a monoclonal antibody specific for a receptor (CR1) on the RBC, which monoclonal antibody is chemically bound to a second Mab specific for the antigen to be cleared from the circulatory system. These chemically cross-linked monoclonal antibody heteropolymers may be injected directly into the patient's circulatory system. Alternatively, red blood cells, extracted from the patient or provided by a suitable donor, are bound to the Mab complex and returned to the system.

Abstract: The invention relates to the identification of complexes of human leukocyte antigen A2 (HLA-A2) molecules and a tyrosinase-derived peptide having the amino acid sequence Met Leu Leu Ala Val Leu Tyr Cys Leu Leu. The invention further relates to the detection of these complexes on the surface of abnormal cells and, in particular, on the surface of melanoma cells. The therapeutic and diagnostic ramifications of this observation are the subject of the invention.

Abstract: The invention relates to epitopes which are present on B cell-bound but not secreted IgA, peptide segments which represent such epitopes, and DNA coding for these peptides. These extracellular peptide segments form, entirely or in part, antigenic epitopes unique to membrane-bound but not secreted IgA.

Abstract: Disclosed are a family of synthetic proteins having binding affinity for a preselected antigen, and multifunctional proteins having such affinity. The proteins are characterized by one or more sequences of amino acids constituting a region which behaves as a biosynthetic antibody binding site (BABS). The sites comprise V.sub.H -V.sub.L or V.sub.L -V.sub.H -like single chains wherein the V.sub.H and V.sub.L -like sequences are attached by a polypeptide linker, or individual V.sub.H or V.sub.L -like domains. The binding domains comprise linked CDR and FR regions, which may be derived from separate immunoglobulins. The proteins may also include other polypeptide sequences which function, e.g., as an enzyme, toxin, binding site, or site for attachment to an immobilization media or radioactive atom.

Abstract: Disclosed are a family of synthetic proteins having affinity for a preselected antigen. The proteins are characterized by one or more sequences of amino acids constituting a region which behaves as a biosynthetic antibody binding site (BABS). The sites comprise 1) non-covalently associated or disulfide bonded synthetic V.sub.H and V.sub.L dimers, 2) V.sub.H -V.sub.L or V.sub.L -V.sub.H single chains wherein the V.sub.H and V.sub.L are attached by a polypeptide linker, or 3) individual V.sub.H or V.sub.L domains. The binding domains comprise linked CDR and FR regions, which may be derived from separate immunoglobulins. The proteins may also include other polypeptide sequences which function e.g., as an enzyme, toxin, binding site, or site of attachment to an immobilization media or radioactive atom. Methods are disclosed for producing the proteins, for designing BABS having any specificity that can be elicited by in vivo generation of antibody, and for producing analogs thereof.

Abstract: Mammalian red blood cells are used to safely and rapidly neutralize and/or clear antigens or immunogens from the circulatory system by binding to the RBC a monoclonal antibody specific for a receptor (CR1) on the RBC, which monoclonal antibody is chemically bound to a second Mab specific for the antigen to be cleared from the circulatory system. These chemically cross-linked monoclonal antibody heteropolymers may be injected directly into the patient's circulatory system. Alternatively, red blood cells, extracted from the patient or provided by a suitable donor, are bound to the Mab complex and returned to the system.

Abstract: Disclosed is a human monoclonal antibody produced by the hybridoma designated Clone 3 and having A.T.C.C. Accession No. CRL 10198. The Clone 3 human monoclonal antibody immunologically binds to a conserved epitope on the transmembrane envelope glycoprotein gp41 of Human Immunodeficiency Virus Type 1 (HIV-1) having the amino acid sequence GCSGKLIC.

Abstract: The invention pertains to a single polypeptide chain binding molecule which has binding specificity and affinity substantially similar to the binding specificity and affinity of the light and heavy chain aggregate variable region of an antibody, to genetic sequences coding therefor, and to recombinant DNA methods of producing such molecule and uses for such molecule.

Abstract: Heterobifunctional antibodies having dual specificities, one specificity directed against a thrombus, and the other specificity directed against a thrombolytic agent are disclosed. The invention also relates to methods of using these heterobifunctional antibodies to lyse a thrombus.

Abstract: Human IgG1 monoclonal antibodies are produced by hybridoma ATCC HB10074 and bind to gp120 of HIV.