Analysis Note
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 with an in-house control by immunoelectrophoresis. 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.
Preparation Method
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.
Applications
Fluorescein-conjugated Goat IgG Fraction to Human Complement C1q is used as a reagent in immunofluorescence assays (IFA), cell staining (fluorescent microscopy and cell sorting), tissue staining, and blot immunostaining.
Product Description
Fluorescein-conjugated Goat IgG Fraction to Human Complement C1q is the lyophilized powder of fluorescein-5-isothiocyanate (FITC "Isomer I")-conjugated goat IgG fraction to human complement C1q and buffer salts.
Typical Working Concentration
Dilution Reccomondations: 1:100 - 1:400 for Tissue Staining; 1:250 - 1:1,000 for Immuno Blotting; 1:1,000 - 1:4,000 for ELISA/FIA