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Threshold免疫分析试剂盒

产品信息
  • The Threshold™ Immunoligand Assay (ILA) measures a broad range of analytes such as proteins, peptides, sequence specific DNA and micro-organisms for biopharmaceutical development and production.  Samples can range from fermentation supernatants, samples from a purification process, and other biochemical preparations to serum or other bodily fluids.  Assays can be developed using a sandwich or competitive format depending on the size and characteristics of the analyte to be measured.  The assay consists of four steps, labeling the antibody, the reaction stage, the separation stage and the detection stage.
     
    Labeling the Antibody
    Using the ILA labeling Kit, antibodies are reproducibly labeled in about 2 hours by mixing them with N-hydroxysuccinimide esters of dinitrophenyl-biotin and fluorescein provided in the kit.  Becasue both haptens are chromogenic, photometric measurements are used to determine the number incorporated 
     
    Reaction Stage
    In the reaction stage, labeled antibodies, the sample solution containing the analyte of interest, streptavidn, and anti-fluoresceneine/urease conjugate are incubated together to form a reaction complex.   Since this binding occurs in solution, all molecules are maintained in their native conformation to assure accurate measurement of the analyte and activity of the antibody.
     
    Separation Stage
    The reaction mixture containing the reaction complex is filtered through a biotinylated membrane.  By leveraging the strong affinity streptavidin has for biotin, the reaction complex is captured and concentrated on the membrane. 
     
    Detection Stage
    The membrane with the captured reaction complex is placed in the Threshold System which contains the substrate urea.  The urea is hydrolyzed by urease producing a pH change that is detected by the systems light-addressable potentiometric sensor.  Urease activity from up to eight different samples can simultaneouly measured on the Threshold system.
     
    Using the ILA Labeling Kit, the following assays have been demonstrated.
    ·               Application of rapid immunoassays (Fast ILA) in cell culture/fermentation and process development using the Threshold System.
    ·               Contaminante bovine IgG assay.
    ·               Contaminante bovine transferrin assay.
    ·               Contaminante BSA assay.
    ·               Contaminante host cell-derived protein assay.
    ·               Contaminante human transferrin assay.
    ·               Protein A contaminant assay. 
    ·               Protein G contaminant assay. 
    ·               Optimizing the labeling of proteins. 
    ·               Sequence-specific DNA assay. 
     
    The Threshold Immunoligand Assay Kit includes all of the reagents required to perform a Threshold System assay, except binding protein (such as antibodies) or DNA probes specific for the analyte of interest.  The kit includes Capture Reagent, Enzyme Reagent, membrane sticks, substrate concentrate, and appropriate buffers and washes.  A Universal Standard is also included, which can be used for training and trouble-shooting purposes without using the specific binding proteins and analyte.
     
    R9003
    Immunoligand Assay Detection Kit 192 determinations  includes: (1) Universal Standard Reagent,  (6) Enzyme Reagent,  (1) Capture Reagent,  (6) Threshold Blank Sticks,   (24) Threshold Sticks,   (1) Substrate,  (1) Assay Buffer Concentrate,  (1) Wash Buffer Concentrate  
     
    R9002
    Immunoligand Assay Labeling Kit  includes: 2 vials Biotin label (5 mg/vial),  2 vials Fluorescein label (5 mg/vial)  
    温馨提示：不可用于临床ZL。
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