摘要:
A homogeneous assay for determining the aflatoxin content in agricultural products uses the technique of fluorescence polarization. A solvent is used to extract aflatoxins from a sample of the agricultural product. A mixture is prepared by combining the extract with a tracer and with a monoclonal antibody specific for aflatoxin. The tracer is able to bind to the monoclonal antibody to produce a detectable change in fluorescence polarization. The tracer is prepared by conjugating an aflatoxin oxime to a suitable fluorophore. The fluorescence polarization of the mixture is measured. The aflatoxin concentration of the mixture may be calculated using a standard curve obtained by measuring the fluorescence polarization of a series of aflatoxin solutions of known concentration.
摘要:
In a homogeneous immunoassay, fluorophore-conjugated lipopolysaccharide derived bacterial antigens are reacted with antibodies specific for the antigens. Quantitative detection of the formation of an immune complex is obtained by measuring the change in fluorescence polarization after complex formation. The reaction occurs quickly (less than two minutes to equilibrium), and involves the addition of only one reagent to a diluted serum specimen. The absence of a solid phase separation step eliminates false positive results and increases throughput.
摘要:
An immunochemical method and reagent compounds for determining ligands in a sample. The reagent compounds are derivatives of a triazinylaminofluorescein and are represented by the structural formula ##STR1## wherein Y is halo or lower alkyl; andR is a ligand-analog wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody.The reagent compound and an antibody specific to the ligand are added to the sample in a fluorescence polarization immunoassay.
摘要:
A radioactive particle counter for a plurality of discrete radioactive particle emitting samples, including a plurality of detectors for each sample to simultaneously detect the respective emitted radioactive particles and provide a respective electrical signal, a plurality of storage counters for simultaneously accumulating the respective sample count during a predetermined counting interval, and a read-out control unit for periodically, sequentially reading out the accumulated sample count in each storage counter and coupling same to a control counter for temporary display of the accumulated sample count or for eventually totalling of the respective sample count.
摘要:
A fluorescence polarization assay for Equine Infectious Anemia Virus utilizes a short peptide reagent probe derived from a conserved immunodominant region of gp45. The probe is N-terminally labeled, preferably with 6-carboxyfluorescein, and purified by HPLC, which reacts in a homogenous assay with anti-EIAV antibodies contained in the serum of field infected horses and ponies. The assay has a sensitivity of about 90 percent with a specificity approaching 100 percent.
摘要:
This disclosure relates to a method and reagents for determining ligands in biological fluids such as serum, plasma, spinal fluid, amnionic fluid and urine. In particular, this disclosure relates to a fluorescent polarization immunoassay procedure and to a novel class of tracer compounds employed as reagents in such procedures. The procedure disclosed combines the specificity of an immunoassay with the speed and convenience of fluorescent polarization techniques to provide a means for determining the amount of a specific ligand present in a sample.
摘要:
This disclosure relates to a method and reagents for determining ligands in biological fluids such as serum, plasma, spinal fluid, amnionic fluid and urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure and to a novel class of tracer compounds employed as reagents in such procedures. The procedure disclosed combines the specificity of an immunoassay with the speed and convenience of fluorescence polarization techniques to provide a means for determining the amount of a specific ligand present in a sample.
摘要:
This disclosure relates to a method and reagents for determining ligands in biological fluids such as serum, plasma, spinal fluid, amnionic fluid and urine. In particular, this disclosure relates to a fluorescent polarization immunoassay procedure and to a novel class of tracer compounds employed as reagents in such procedures. The procedure disclosed combines the specificity of an immunoassay with the speed and convenience of fluorescent polarization techniques to provide a means for determining the amount of a specific ligand present in a sample.
摘要:
The present invention provides an assay for detection of M. bovis-infected animals. A tracer, comprising a peptide of M. bovis protein MPB70 conjugated to a fluorophore, is added to a serum sample from an animal to form a mixture. The fluorescence polarization of the mixture in then measured and compared to the fluorescence polarization of a control. The present invention further provides a tracer for use in fluorescence polarization assay to detect antibodies specific for M. bovis. The tracer comprises a peptide of M. bovis protein MPB70 conjugated to a fluorophore, such that the tracer is able to bind to antibodies specific for M. bovis to produce a detectable change in fluorescence polarization.
摘要:
A homogeneous assay for determining the fumonisin content in grains uses the technique of fluorescence polarization. A grain extract is prepared by shaking a crushed grain sample with a solvent. A mixture is prepared by combining the grain extract with a tracer and with monoclonal antibodies specific to fumonisin. The tracer is able to bind to the monoclonal antibodies to produce a detectable change in fluorescence polarization. The tracer is prepared by conjugating fumonisin to a suitable fluorophore. The fluorescence polarization of the mixture is measured. The fumonisin concentration of the mixture may be calculated using a standard curve obtained by measuring the fluorescence polarization of a series of fumonisin solutions of known concentration.