Product Description |
Protein A affinity chromatography is widely used for antibody
purification. Protein A ligand leakage, even though covalently conjugated to
the chromatography support, is a big problem for pharmaceutical industry. And
it also probably causes false results in immunological assays if antibody product
is contaminated with Protein A. GenScript Protein A ELISA Kit is developed for the accurate quantification
of native Protein A, recombinant Protein A variants and MabSelect SuRe™ (Alkali-tolerant recombinant protein A) in the presence or absence of antibodies. The kit offers a sensitive
assay for users in pharmaceutical industry to measure mini amount of Protein A
in therapeutic antibody products.
Antibody suppliers can use the kit to evaluate Protein A containment
level of the products. It also brings convenience to the manufacturers of Protein
A affinity chromatography media in the process of monitoring leaching
characteristics of the media under specific conditions. This kit detects residual Protein A in a
sandwich immunoassay. It utilizes two clones of Protein A monoclonal
antibodies that bind Protein A at different domains. One monoclonal antibody is pre-coated on the
polystyrene microtiter plate to capture Protein A in samples. Another monoclonal antibody with Biotin
conjugated is then added to the plate to interact with Protein A. Subsequently horseradish peroxidase (HRP) labeled with streptavidin
is added to bind the second antibody. The final step involves the addition of TMB Solution. The color intensity is proportional to the amount of
Protein A present in the test samples. Sample process is crucial to the Protein A quantification assay. Leached
Protein A can interact with Fc region of antibody, which negatively influence
the accurate quantification of Protein A. Protein A ELISA Kit provides an optimized
sample treatment protocol, thereby offering more reliable results. |
Key Features |
Accurate quantification of 20 pg/ml Protein A
contaminant or 50 pg/ml MabSelect SuRe™ Broad-range
detection of natural Protein A, recombinant Protein A variants and MabSelect SuRe™ Time saving protocol - complete test in 2 hours
or less Ready-to-use ELISA plate with fast &
simple sample preparation Exceptional lot-to-lot consistency guaranteed
by high-quality monoclonal antibodies Wide applications for the quantification of
Protein A contaminant and leaching |
Sensitivity |
Recombinant Protein A: LOD: 20 pg/ml LOQ: 50 pg/ml MabSelect SuRe™ Protein A: LOD: 50 pg/ml LOQ: 100 pg/ml |
Precision |
Intra-assay Precision: CV<5% Inter-assay
Precision: CV<10% |
Kit Contents |
Components |
Quantity |
Part.No |
96-well plate coated with anti-Protein A mAb |
1 plate (8 wells x 12 strips) |
430-80 |
Biotin conjugated anti-Protein A mAb |
0.5 ml |
430-20 |
Streptavidin-HRP |
12 ml |
430-30 |
Recombinant Protein A Standard (10 μg/ml) |
1 ml |
430-10 |
MabSelect SuRe™ Protein A Standard (10 μg/ml) |
1 ml |
430-11 |
Antibody Dilution Buffer |
15 ml |
430-90 |
5x Sample Dilution Solution |
30 ml |
430-60 |
20× Wash Solution |
40 ml |
B-A1-70 |
10% Tween 20 |
1 ml |
430-A0 |
TMB Solution |
12 ml |
B-A1-40 |
Stop Solution |
6 ml |
B-A1-50 |
Plate Sealer |
2 pieces |
NA |
|
Storage |
The reagents in
the kit are stable for 12 months when stored at 2-8 oC. |
For research use only. Not intended for human or animal clinical trials, therapeutic
or diagnostic use.