Background: HEPACAM Protein Biology

HEPACAM (Hepatocyte Cell Adhesion Molecule), also known as GlialCAM, is a type I transmembrane glycoprotein belonging to the immunoglobulin superfamily (IgSF). It was originally identified in hepatocytes and subsequently found to be highly expressed in glial cells of the central nervous system (CNS). HEPACAM plays important roles in cell–cell adhesion, cell migration, and the regulation of membrane protein localization, particularly in astrocytes.

Mutations in the HEPACAM gene have been associated with megalencephalic leukoencephalopathy with subcortical cysts (MLC), a rare inherited white matter disorder. Additionally, HEPACAM has been studied as a candidate tumor suppressor in hepatocellular carcinoma and glioma. Recombinant Human HEPACAM Protein enables researchers to perform controlled in vitro experiments, characterize receptor interactions, and develop potential therapeutic strategies.

Materials and Equipment Required

Before beginning reconstitution and experimental use of Recombinant Human HEPACAM Protein (rp365282), ensure the following materials and equipment are available:

• Recombinant Human HEPACAM Protein (Aladdin SKU: rp365282)
• Sterile phosphate-buffered saline (PBS, pH 7.4) or manufacturer-specified reconstitution buffer
• Sterile deionized water (if specified by product datasheet)
• Low-protein-binding microcentrifuge tubes (1.5 mL)
• Calibrated micropipettes and sterile tips
• Refrigerated microcentrifuge
• -20°C or -80°C freezer for long-term storage
• Protein quantification reagents (e.g., BCA or Bradford assay kit)
• Appropriate ELISA plates, cell culture plates, or gel electrophoresis apparatus depending on downstream assay

Note: Always consult the official product datasheet supplied with SKU rp365282 for the most accurate and up-to-date specifications prior to use.

Step-by-Step Reconstitution and Handling Protocol

Follow the steps below to reconstitute and handle Recombinant Human HEPACAM Protein correctly and safely:

1. Equilibrate the vial: Remove the protein vial from storage and allow it to equilibrate to room temperature for approximately 10–15 minutes before opening. Do not expose the lyophilized protein to direct heat sources.
2. Prepare reconstitution buffer: Use sterile PBS (pH 7.4) or the buffer specified in the product datasheet for rp365282. Ensure the buffer is at room temperature prior to addition.
3. Reconstitute: Add the appropriate volume of reconstitution buffer to the vial as directed by the datasheet to achieve the recommended stock concentration. Gently swirl or pipette to mix — do not vortex, as this may denature the protein.
4. Centrifuge briefly: Spin the vial at low speed (e.g., 500–1000 × g for 30 seconds) to collect any residual protein from the walls and cap of the vial.
5. Verify dissolution: Inspect the solution for clarity. If particulates are observed, allow the vial to stand for an additional 5 minutes and mix gently again.
6. Quantify protein concentration: Confirm the actual protein concentration using a BCA or Bradford assay to ensure consistency across experiments.
7. Aliquot immediately: Divide the reconstituted protein into single-use aliquots in low-protein-binding tubes to prevent repeated freeze-thaw cycles, which can degrade activity.
8. Store appropriately: Store aliquots at -20°C for short-term use (up to 1 month) or at -80°C for long-term storage. Refer to the product datasheet for specific stability data.

Important: Avoid repeated freeze-thaw cycles. Each cycle may reduce protein activity and compromise experimental reproducibility.

Recommended Applications and Working Concentrations

Recombinant Human HEPACAM Protein (rp365282) is suitable for a variety of research applications. Recommended working concentrations may vary depending on the specific assay format and experimental conditions. Always optimize concentrations empirically for your system.

Disclaimer: The concentration ranges listed above are general guidelines based on typical recombinant protein usage. Refer to the product datasheet for rp365282 for validated application data and confirmed concentration ranges specific to this product.

Troubleshooting and Quality Control

If unexpected results are obtained when using Recombinant Human HEPACAM Protein, consider the following troubleshooting guidance:

• No or weak signal in ELISA/Western blot: Verify protein concentration by BCA assay. Check that the protein was fully dissolved and not aggregated. Confirm compatibility of detection antibody with the recombinant protein construct.
• Protein aggregation or precipitation: Ensure reconstitution buffer pH and ionic strength are appropriate. Avoid vortexing. If aggregation persists, briefly centrifuge at 10,000 × g for 5 minutes and use supernatant.
• Loss of biological activity: Confirm that the protein has not undergone more than one freeze-thaw cycle. Check storage temperature and duration against product datasheet specifications.
• Inconsistent results between experiments: Always use freshly thawed aliquots. Standardize protein quantification method across experiments. Ensure all reagents and buffers are within their expiry dates.
• Unexpected molecular weight on SDS-PAGE: HEPACAM is a glycoprotein; apparent molecular weight on denaturing gels may differ from the calculated molecular weight due to glycosylation. This is expected and not indicative of product quality issues.

For additional technical support, contact Aladdin Scientific's technical service team with your order number and lot number.