Abstract: A protein comprising an antigen-binding portion formed by two cooperating peptide sequences of FIGS. 3A and 3B of the application. The protein may alternatively comprise an altered antigen-binding portion where at least one of the peptide sequences is an altered sequence, an altered sequence being a sequence of FIG. 3A or 3B in which one or more of an amino acid residue has been added, deleted or replaced by another amino acid residue. The altered antigen-binding portion retains substantially the same antigen-binding specificity as said antigen-binding portion. Also disclosed are apparatus, systems and methods for detecting small assayed molecules in a sample using the protein.

Abstract: Chimeric receptor genes suitable for endowing lymphocytes with antibody-type specificity include a first gene segment encoding a single-chain Fv domain of a specific antibody and a second gene segment encoding all or part of the transmembrane and cytoplasmic domains, and optionally the extracellular domain, of an immune cell-triggering molecule. The chimeric receptor gene, when transfected to immune cells, expresses the antibody-recognition site and the immune cell-triggering moiety into one continuous chain. The transformed lymphocytes are useful in therapeutic treatment methods.

Abstract: A cytotoxic protein expressed by human peripheral blood mononuclear cells is isolated in essentially homogenous form. This protein may be used to elicit production of polyclonal or monoclonal anti-cytotoxin antibodies.Hybridomas secreting anti-cytotoxin antibodies are identified by a solid phase bioassay. The antibodies are useful in the immunopurification of cytotoxins. The purified cytotoxic proteins are useful for the treatment of virus-infected or tumor target cells, either alone or in combination with interferon or a metabolic blocker.

Abstract: There are produced recombinant gene pairs which endow mononuclear cells, mainly various lymphocyte type cells, with antibody-type specificity. In specific gene pairs the rearranged gene pairs code for a binding site of an antibody molecule from the same species, of the T-cell receptor gene, or another species. Gene pairs of the invention code, for example, for antibodies specific towards tumor-specific antigens, viral antigens, modified self antigens, bacterial or fungal antigens, autoimmune type disease antigens and the like. The invention further relates to expression vectors for the effective transfection of such cell types comprising such a recombinant gene pair, to methods for producing same and to pharmaceutical compositions comprising as active ingredient an effective quantity of lymphocytes transfected with such gene pairs.

Abstract: There are produced recombinant gene pairs which endow mononuclear cells, mainly various lymphocyte type cells, with antibody-type specificity. In specific gene pairs the rearranged gene pairs code for a binding site of an antibody molecule from the same species, of the T-cell receptor gene, or another species. Gene pairs of the invention code, for example, for antibodies specific towards tumor-specific antigens, viral antigens, modified self antigens, bacterial or fungal antigens, autoimmune type disease antigens and the like. The invention further relates to expression vectors for the effective transfection of such cell types comprising such a recombinant gene pair, to methods for producing same and to pharmaceutical compositions comprising as active ingredient an effective quantity of lymphocytes transfected with such gene pairs.

Abstract: A method for screening or detection of a non-enzyme catalytic polypeptide or protein for the conversion of a substrate S to a product P is provided, in which a preparation containing the potential catalyst is contacted with the substrate S immobilized to a support and the immobilized product P obtained is detected, preferably by immunoassay. The method is preferably used for the screening of hybridoma supernatants for catalytic monoclonal antibodies that catalyze acyl transfer reactions, e.g., hydrolysis or aminolysis, condensation reactions and resolution of enantiomers.