Product Details
Source
The mouse monoclonal antibody is produced from a hybridoma resulting from fusion of SP2/0 myeloma and B-lymphocytes obtained from a mouse immunized with Spike RBD. The antibody is specific against the Omicron (B.1.1.529/BA.1) variant of SARS-CoV-2, and has no binding with the spike RBD of the wild type virus and other viral lineages.
Clone
AS113
Isotype
Mouse IgG1, Kappa
Host Species
Mouse
Reactivity
Virus
Immunogen
Recombinant SARS-CoV-2 Spike RBD (B.1.1.529/Omicron) erived from human 293 cells
Specificity
This product is a specific antibody against Spike RBD of Omicron (B.1.1.529/BA.1) variant of SARS-CoV-2. Cross-reactivity with Spike protein RBD domain of other coronaviruses, including SARS-CoV, MERS-CoV, HCoV-229E, HCoV-NL63, HCoV-OC43 and HCoV-HKU1, has not been tested.
Application
ApplicationRecommended Use / PerformanceELISA0.2-2 μg/mLPurification
Protein A purified.
Concentration
Please refer to the Certificate of Analysis (CoA).
Form
Lyophilized
Formulation
Lyophilized from a 0.22 μm-filtered solution in PBS (pH 7.4), with trehalose as protectant.
Please contact us for customized product forms or formulations.
Reconstitution
Please refer to the Certificate of Analysis (CoA) for specific instructions.
Shipping
Lyophilized product is shipped at ambient temperature.
Storage
For long term storage, the product should be stored in a 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.
Notices
Product Specific Notices: For research use only.
ACRO Quality Management System
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Performance Data
Bioactivity-ELISA

Immobilized SARS-CoV-2 Spike RBD, His Tag (B.1.1.529/Omicron) (Cat. No. SPD-C522e) can bind Anti-SARS-CoV-2 Spike RBD Antibody, Mouse IgG1 (AS113) (Omicron Specific) (Cat. No. SPD-M305) with a linear range of 0.4-12.5 ng/mL (QC tested). The antibody does not bind Spike RBD of WT (Cat. No. SPD-C52H1), Alpha (Cat. No. SPD-C52Hn), Beta (Cat. No. SPD-C52Hp), Delta (Cat. No. SPD-C52Hh) and Gamma (Cat. No. SPD-C52Hr).
Protocol
Bioactivity-BLI

Loaded Anti-SARS-CoV-2 Spike RBD Antibody, Mouse IgG1 (AS113) (Omicron Specific) (Cat. No. SPD-M305) on AMC Biosensor, can bind SARS-CoV-2 Spike RBD, His Tag (B.1.1.529/Omicron) (Cat. No. SPD-C522e) with an affinity constant of 9.07 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely 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
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