Biological Background: alpha 1 Spectrin and Its Role in the Cell

Spectrin is a cytoskeletal protein that plays a fundamental role in maintaining the structural integrity and mechanical flexibility of the plasma membrane. It exists as an alpha/beta heterodimer, with alpha 1 spectrin (SPTA1) being the primary alpha-chain isoform expressed in erythrocytes (red blood cells). These heterodimers self-associate head-to-head to form tetramers, which crosslink short actin filaments and other membrane-associated proteins to create a two-dimensional lattice on the cytoplasmic face of the cell membrane.

Beyond erythrocytes, spectrin isoforms are expressed in a wide variety of cell types including neurons, epithelial cells, and muscle cells, where they contribute to organelle positioning, vesicle trafficking, and signal transduction scaffolding. Mutations or deficiencies in alpha 1 spectrin are clinically associated with hereditary hemolytic anemias such as hereditary spherocytosis and hereditary elliptocytosis, making this protein a medically relevant research target.

Researchers studying membrane mechanics, red blood cell disorders, or cytoskeletal remodeling frequently require reliable tools to detect and quantify alpha 1 spectrin expression and localization. A well-validated monoclonal antibody provides the specificity and batch-to-batch reproducibility essential for these studies.

Antibody Specifications and Product Details

The alpha 1 Spectrin Mouse mAb (Ab351148) is a mouse-derived monoclonal antibody raised against alpha 1 spectrin. As a monoclonal antibody, it recognizes a single, defined epitope on the target antigen, ensuring high specificity and reproducible performance across experiments and laboratories.

Formulation: The antibody is supplied in PBS (phosphate-buffered saline) only, without carrier proteins such as BSA or stabilizers such as azide unless otherwise stated on the product datasheet. Researchers should verify the exact formulation details on the current product datasheet before use, as formulation affects dilution calculations and compatibility with certain assay formats.

Storage: Monoclonal antibodies in PBS formulation should generally be stored at –20 °C for long-term storage, with working aliquots maintained at 4 °C to minimize freeze-thaw cycles. Specific storage recommendations should be confirmed on the product datasheet.

Reference code: This product is also referenced under the code absea#KC-42644, which may be used for cross-referencing with supplier documentation or previous order records.

For full technical specifications including lot-specific concentration, purity, and validated applications, always consult the current Certificate of Analysis (CoA) and product datasheet available through Aladdin Scientific.

Recommended Applications and Protocols

Mouse monoclonal antibodies targeting structural cytoskeletal proteins such as alpha 1 spectrin are commonly employed in a range of immunodetection techniques. The following applications represent those typically validated for anti-spectrin monoclonal antibodies; researchers should confirm application-specific validation on the Ab351148 product datasheet before use.

• Western Blotting (WB): Alpha 1 spectrin has a molecular weight of approximately 280 kDa, and a specific band at or near this size is expected in cell or tissue lysates from spectrin-expressing sources such as erythrocytes or brain tissue. Standard SDS-PAGE protocols with reducing conditions are typically used. Recommended starting antibody dilution should be referenced from the product datasheet.
• Immunofluorescence (IF) / Immunocytochemistry (ICC): Anti-spectrin antibodies can be used to visualize the sub-membranous cytoskeletal network in fixed cells. Paraformaldehyde fixation followed by appropriate permeabilization (e.g., Triton X-100) is commonly employed.
• Immunoprecipitation (IP): Monoclonal antibodies with high affinity may be suitable for pulling down spectrin complexes from cell lysates for downstream interaction studies.
• Immunohistochemistry (IHC): Tissue sections from erythrocyte-rich or neuronal tissues may be probed to assess spectrin expression and distribution in situ.

Always titrate the antibody for each specific application and sample type. Use appropriate positive controls (e.g., erythrocyte ghost preparations or brain lysate) and negative controls to validate results.

Troubleshooting and Quality Considerations

Achieving optimal results with any primary antibody requires careful attention to experimental conditions. The following guidance addresses common issues encountered when working with anti-spectrin antibodies:

High background or non-specific bands: Ensure thorough blocking (e.g., 5% non-fat dry milk or BSA in TBST for WB) prior to primary antibody incubation. Optimize antibody concentration by titration. For IHC and IF, endogenous peroxidase or biotin blocking steps may be necessary depending on the detection system used.

Weak or absent signal: Alpha 1 spectrin is a large protein (~280 kDa); ensure SDS-PAGE gels are appropriate for high-molecular-weight protein resolution (e.g., 6–8% acrylamide). Confirm that the sample source expresses alpha 1 spectrin — erythrocyte lysates or brain tissue are reliable positive controls. Check that the antigen retrieval method used (for IHC) is compatible with the epitope recognized by this clone.

Antibody storage and handling: Repeated freeze-thaw cycles degrade monoclonal antibody performance. Prepare single-use aliquots upon first use and store at –20 °C. The PBS-only formulation means the antibody lacks preservatives; aseptic handling is recommended.

Lot-to-lot consistency: As a monoclonal antibody, Ab351148 offers superior consistency relative to polyclonal alternatives. Always request the CoA for each new lot and compare key quality parameters.

Ordering Information and Support

Alpha 1 Spectrin Mouse mAb is available from Aladdin Scientific under SKU Ab351148. This product is intended for research use only (RUO) and is not approved for diagnostic or therapeutic applications in humans.

When placing an order, reference SKU Ab351148 to ensure accurate fulfillment. The internal reference code absea#KC-42644 may also be cited when contacting technical support or customer service for product-related inquiries.

Aladdin Scientific's technical support team is available to assist with application-specific recommendations, protocol optimization, and interpretation of results. For bulk orders, custom formulations, or special packaging requirements, please contact our sales team directly.

All products are subject to Aladdin Scientific's standard terms and conditions, including our returns and quality guarantee policies. Please review the Safety Data Sheet (SDS) prior to handling this product.