The total protein is measured using the Biuret procedure with bovine albumin as the standard; F/P ratio is calculated using absorbance at 491.5nm. Antibody titer of the IgG fraction is standardized by equivalence-point precipitation. The IgG fraction is tested for purity and specificity at 40 mg/mL using immunoelectrophoresis. The product is mostly goat IgG; no trace of albumin is detected.
Antibody and FITC are conjugated under defined conditions to obtain the specified molar ratio (3-6 mol/mol). Conjugated protein is purified by gel filtration. The product is dialyzed into 0.02M sodium phosphate, 0.14M sodium chloride, pH 7.3, with 0.05% sodium azide, adjusted to standard titer, filtered through a 0.22 μm filter, vialed, and lyophilized.
IgGs are glycoprotein antibodies that modulate several immune responses. Rabbit IgGs against target proteins are often used as primary antibodies in various research applications. Thus, secondary anti-rabbit IgGs conjugated to a detectable substrate are useful tools for the analysis of target proteins. Anti-Rabbit IgG (whole molecule)-FITC antibody reacts with rabbit serum and rabbit IgG.
Fluorescein-conjugated Goat IgG fraction to Rabbit IgG is used as a reagent in immunofluorescence assays (IFA), cell staining (fluorescent microscopy and cell sorting), tissue staining, and blot immunostaining. (Note: F(ab')2 fragments are recommended for staining of cells or tissues which contain Fc receptors. Affinity purified antibodies are recommended to avoid non-specific binding from the inherent antibodies of host animals).
Fluorescein-conjugated Goat IgG fraction to Rabbit IgG is the lyophilized powder of fluorescein-5-isothiocyanate (FITC "Isomer I")-conjugated goat IgG fraction to rabbit IgG (whole molecule) and buffer salts.
Reconstitution: Reconstitute product with 2.0 mL of deionized or distilled water. Gentle swirling may be used to speed rehydration. Avoid vigorous shaking of the reconstituted material.