Polyclonal sera specific to TSWV were produced from rabbit and the IgG specific to TSWV was further purified using Protein A affinity chromatography from sera. The concentration of TSWV-IgG was 1.0 mg/ml. In the production of AuNPs conjugated with TSWV-IgG, the particle size is inversely proportional to the sodium citrate volume.
In the TSWV-IgG antibody-AuNP conjugation, the antibody was absorbed on the AuNP surface.
The effects of pH values on the conjugation were studied by evaluating the absorbance between 400 nm and 650 nm.
Also, the main purpose of the assay was to allow visual evaluation, so it was only used as a qualitative assay to detect contamination at a threshold level.
As the KCO3 concentration increased, the maximum absorption wavelength increased up to the optimal concentration and then decreased (data not shown).
The definition of the optimal concentration of TSWV-antibody was the one that gave
the required visibility and the best sensitivity. During antibody concentration optimization, the minimal stable polyclonal IgG concentration form antibody-AuNP conjugation was firstly designed and evaluated (Fig. 2),
Polyclonal sera specific to TSWV were produced from rabbit and the IgG specific to TSWV was further purified using Protein A affinity chromatography from sera. The concentration of TSWV-IgG was 1.0 mg/ml. In the production of AuNPs conjugated with TSWV-IgG, the particle size is inversely proportional to the sodium citrate volume. In the TSWV-IgG antibody-AuNP conjugation, the antibody was absorbed on the AuNP surface. The effects of pH values on the conjugation were studied by evaluating the absorbance between 400 nm and 650 nm. Also, the main purpose of the assay was to allow visual evaluation, so it was only used as a qualitative assay to detect contamination at a threshold level.As the KCO3 concentration increased, the maximum absorption wavelength increased up to the optimal concentration and then decreased (data not shown). The definition of the optimal concentration of TSWV-antibody was the one that gavethe required visibility and the best sensitivity. During antibody concentration optimization, the minimal stable polyclonal IgG concentration form antibody-AuNP conjugation was firstly designed and evaluated (Fig. 2),
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