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Product Details
Synonyms
MS4A1, CD20, MS4A-1
Source
Human CD20 Protein, Llama IgG2b Fc Tag (CD0-H5254) is expressed from human 293 cells (HEK293). It contains AA Lys 142 - Ser 188 (Accession # P11836-1).
Predicted N-terminus: Glu
Request for sequenceMolecular Characterization
Other Tags and Version Biotin & Other Labeled Version
This protein carries a llama IgG2b Fc tag at the N-terminus.
The protein has a calculated MW of 33.3 kDa. The protein migrates as 40-45 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
Endotoxin
Less than 0.05 EU per μg by the LAL method / rFC method.
Purity
>90% as determined by SDS-PAGE.
>90% as determined by SEC-HPLC.
Formulation
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 25 mM Arginine, 150 mM NaCl, pH7.5 with trehalose as protectant.
Contact us for customized product form or formulation.
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.
Shipping and Storage
This product is shipped at ambient temperature.
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:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
ACRO Quality Management System
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Performance Data
SDS-PAGE
Human CD20 Protein, Llama IgG2b Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).
SEC-HPLC
The purity of Human CD20 Protein, Llama IgG2b Fc Tag (Cat. No. CD0-H5254) was greater than 90% as determined by SEC-HPLC.
Bioactivity-SPR
Obinutuzumab Biosimilar immobilized on CM5 Chip can bind Human CD20 Protein, Llama IgG2b Fc Tag (Cat. No. CD0-H5254) with an affinity constant of 691 nM as determined in a SPR assay (Biacore 8K) (QC tested).
Protocol
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FAQ
- product
Can lyophilized proteins remain stable during room-temperature shipping or temporary room-temperature exposure?
In general, lyophilized proteins remain stable during room-temperature shipping or temporary exposure to room-temperature conditions.
Many ACROBiosystems recombinant proteins are supplied in lyophilized (freeze-dried) form. The lyophilization process effectively removes moisture from the product, helping reduce degradation-related reactions and improve protein stability during transportation and storage.
To evaluate the stability of lyophilized proteins under normal temperature conditions, ACROBiosystems conducted a stability study on 11 representative lyophilized protein products at 37°C. The study demonstrated that these proteins maintained good quality stability after storage at 37°C for approximately 20 days. Based on these validation results, temporary room-temperature exposure during shipping or handling is generally not expected to have a significant impact on product quality or downstream application performance.
To ensure optimal long-term stability, products should be stored according to the storage conditions specified in the product Certificate of Analysis (COA) upon receipt.
Supporting Document
Background
Recent Advances
Drug Development Progress- English Name：
B-lymphocyte antigen CD20
- Category：
- Approved Drugs：
35 Details
- Drugs in Clinical Trials：
132 Details
- Highest Development Stage：
Approved
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