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Immunogen
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Purified IgG isolated from pooled goat serum. Freund's complete adjuvant is used in the first step of the immunization procedure.
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Specificity
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The reactivity of the antiserum is directed to the Fc and Fab subunits of the IgG molecule. It includes a certain degree of reactivity with other immunoglobulins via the common Fab portion.
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Cross-Reactivity
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Cow (Bovine), Monkey, Sheep (Ovine), Human
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No Cross-Reactivity
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Hamster, Chicken, Pigeon, Turkey
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Characteristics
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Physicochemical characteristics: IgG protein concentration 10 mg/mL. Fluorochrome/IgG protein molar ratio (F/P) is approximately 1.8.
Physical form: TRITC-coupled purified hyperimmune donkey IgG lyophilized from a solution in phosphate buffered saline (PBS, pH 7.2).
Fluorescent marker: Tetramethylrhodamine isothiocyanate isomer R. It has an orange-red fluorescence. Excitation: 554 nm, emission: 573 nm. To avoid nonspecific background staining, specially synthesized and exceptionally pure crystalline isomer R has been used instead of the usual racemic mixture. Although its fluorescence efficiency is less than of FITC, TRITC conjugates have the advantage of significantly less photo bleaching. This facilitates their use in quantitative cell-counting procedures.
Conjugation procedure: A proprietary technique for the binding to TRITC is used, followed by several purification steps to remove free reactants and protein aggregates. After each step activity and specificity are tested in a variety of techniques. The conjugate is lyophilized to assure stability and long shelf life.
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Purification
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Hyperimmune antisera with strong precipitating activity are selected for fractionation by salt-precipitation and purification of the IgG fraction by DEAE-chromatography. Adsorption: No adsorption required.
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