表达区间及表达系统（Source）
Mouse monoclonal antibody is produced from a hybridoma resulting from fusion of SP2/0 myeloma and B-lymphocytes obtained from a mouse immunized with Rituximab F(ab')2.
亚型（Isotype）
IgG1/kappa
特异性（Specificity）
Recognizes Rituximab specifically, no cross reactivity with other humanized antibodies.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- 4-8°C for 12 months in lyophilized state;
- -70°C for 3 years under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Anti-Rituximab Antibodies (recommended for PK/PD) on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
活性（Bioactivity）-ELISA
Detection of rituximab by bridging ELISA in serum. Immobilized Anti-Rituximab Antibodies (Cat. No. RIB-Y37) at 2 μg/mL, add increasing concentrations of rituximab (10% human serum) and then add Biotinylated Anti-Rituximab Antibodies (Cat. No. RIB-BY35) at 1 μg/mL. Detection was performed using HRP-conjugated streptavidin with a sensitivity of 1 ng/mL.
Protocol
Demonstration of the specificity of Anti-Rituximab Antibodies (Cat. No. RIB-Y37) to the rituximab.
Protocol
活性（Bioactivity）-FACS
FACS analysis shows that the binding of rituximab to 293F overexpressing CD20 was inhibited by increasing concentration of Anti-Rituximab Antibodies (Cat. No. RIB-Y37). The concentration of rituximab used is 10 ng/ml. The IC50 is 0.019 μg/ml (Routinely tested).
Protocol
背景（Background）
Rituxan is a genetically engineered chimeric murine/human monoclonal antibody directed against the CD20 antigen found on the surface of normal and malignant B lymphocytes. The antibody is an IgG1 kappa immunoglobulin containing murine light- and heavy-chain variable region sequences and human constant region sequences. Rituximab is composed of two heavy chains of 451 amino acids and two light chains of 213 amino acids.
