Abstract: The present invention is directed to a method for determining the level of oxidized glutathione, or the ratio of reduced glutathione to oxidized glutathione, in a biological sample utilizing the thiol scavenging reagent 1-methyl-2-vinylpyridinium trifluoromethanesulfonate or another salt thereof at a level which rapidly scavenges reduced glutathione but does not interfere with the measurement of oxidized glutathione.

Abstract: This invention relates to a method for the immunoassay of AZT (3'-azido-3'-deoxythymidine), also known as zidovudine, in biological fluids such as serum, semen, plasma and urine, as well as other body fluids. The invention also includes (1) various novel analogs of AZT useful in preparing immunogens for antibodies to AZT and in preparing labeled AZT, (2) immunogens for antibodies to AZT, (3) monoclonal and polyclonal antibodies to AZT, (4) labeled AZT analogs and (5) diagnostic test kits for the immunoassay.

Abstract: This invention relates to a method for the immunoassay of ddI (2',3'-dideoxyinosine), also known as didanosine, in biological fluids such as serum, semen, plasma and urine, as well as other body fluids. The invention also includes (1) various novel analogs of ddI useful in preparing immunogens for antibodies to ddI and in preparing labeled ddI, (2) immunogens for antibodies to ddI, (3) antibodies to ddI, (4) labeled ddI analogs and (5) diagnostic test kits for the immunoassay.

Abstract: This invention relates to a method for the immunoassay of AZT (3'-azido-3'-deoxythymidine), also known as zidovudine, in biological fluids such as serum, semen, plasma and urine, as well as other body fluids. The invention also includes (1) various novel analogs of AZT useful in preparing immunogens for antibodies to AZT and in preparing labeled AZT, (2) immunogens for antibodies to AZT, (3) monoclonal and polylonal antibodies to AZT, (4) labeled AZT analogs and (5) diagnostic test kits for the immunoassay.

Abstract: A reagent is disclosed for determining the concentration of a ligand in blood serum. The reagent includes a protenaceous, three-dimensional, serum-insoluble complex which is readily collected by centrifugation, the complex comprising non-specific immunoglobulins, anti-ligand immunoglobulins, immunoglobulins which are antibodies to the previously mentioned immunoglobulins and which are complexed therewith, and a labeled ligand complexed with the anti-ligand immunoglobulins. The reagent is particularly useful in competitive binding analyses such as radioimmunoassays.

Abstract: A resultant color step indicator for use in various diagnostic or analytic test procedures particularly useful in those involving qualitative and quantitative analysis, such as radioimmunoassay, where a number of steps must be accomplished consecutively in order to get a proper final measurement. The various reagents which must be consecutively added are colored with an inert coloring. The coloring does not enter into the chemical reaction that yields the test results. It serves only to combine or intermix with the other coloring to indicate which steps have been completed. As the test is run, each step in the procedure which involves the addition of a different colored reagent results in a color change in the test specimen and the resultant color of the test specimen indicates which steps in the procedure have been accomplished.