Recombinant Human MCEMP1 Protein: Handling & Usage Protocol

Recombinant Human MCEMP1 Protein is a research-grade reagent designed for use in immunological assays, mast cell functional studies, and related in vitro applications requiring a well-characterized human membrane protein antigen.

Product Name

Recombinant Human MCEMP1 Protein

SKU

rp365340

Protein Origin

Human (Homo sapiens)

Application

In vitro research; immunological and functional assays

Storage Recommendation

Avoid repeated freeze-thaw cycles; store aliquots at -80°C for long-term stability

Protein Class

Mast Cell Expressed Membrane Protein 1 (MCEMP1)

Background: MCEMP1 Biology and Research Relevance

Mast Cell Expressed Membrane Protein 1 (MCEMP1) is a transmembrane protein predominantly expressed on mast cells and certain monocyte/macrophage populations. It has been implicated in innate immune signaling and inflammatory responses. Research into MCEMP1 has expanded in the context of allergic disease, pulmonary inflammation, and mast cell activation pathways.

Recombinant Human MCEMP1 Protein provides a defined, reproducible antigen source for researchers studying MCEMP1 expression, antibody development, binding assays, and cell-based functional experiments. Using a recombinant form ensures batch-to-batch consistency and eliminates the variability associated with native protein isolation from primary cells.

Materials Required

Before beginning, ensure the following materials are available:

• Recombinant Human MCEMP1 Protein (SKU: rp365340)
• Sterile, ultrapure water or recommended reconstitution buffer (e.g., PBS, pH 7.4)
• Low-binding microcentrifuge tubes
• Micropipettes and sterile tips
• Ice bucket and dry ice or liquid nitrogen for handling
• Protein quantification reagents (e.g., BCA or Bradford assay kit) if required
• Appropriate downstream assay reagents (ELISA, SDS-PAGE, cell culture media, etc.)

Consult the product datasheet for the specific reconstitution buffer, protein concentration, and formulation details prior to use.

Reconstitution and Handling Protocol

Step 1 – Thawing: Remove the vial from -80°C storage and thaw slowly on ice or at 4°C. Do not thaw at room temperature or in a water bath, as rapid temperature changes can compromise protein integrity.

Step 2 – Centrifugation: Briefly centrifuge the vial (e.g., 300–500 × g for 15–30 seconds) to collect any lyophilized material or condensate at the bottom of the tube before opening.

Step 3 – Reconstitution (if lyophilized): Add the recommended volume of sterile reconstitution buffer slowly and gently along the side of the vial. Do not pipette directly onto the protein pellet with force. Allow the vial to sit for 10 minutes at room temperature, then mix gently by swirling or pipetting slowly. Avoid vortexing, which can cause denaturation and aggregation.

Step 4 – Aliquoting: Prepare single-use aliquots in low-binding tubes to prevent protein loss through adsorption to tube walls and to avoid repeated freeze-thaw cycles, which degrade protein activity over time.

Step 5 – Quality Check: If protein quantification is required, use a BCA or Bradford assay according to the kit manufacturer's instructions. Verify expected molecular weight by SDS-PAGE if needed.

Storage Conditions and Stability

For short-term use (within 1–2 weeks), reconstituted protein may be stored at 4°C. For long-term storage, freeze aliquots at -80°C. Protein stability can be enhanced by adding a carrier protein such as 0.1% BSA or glycerol to a final concentration of 5–10%, unless this would interfere with downstream assays.

Avoid repeated freeze-thaw cycles. Each cycle can result in protein aggregation, loss of biological activity, and reduced assay performance. Label all aliquots clearly with the date of reconstitution, protein concentration, and storage conditions.

Always consult the official Aladdin Scientific product datasheet for lot-specific storage instructions, as formulation details may vary between lots.

Recommended Applications and Quality Control

Recombinant Human MCEMP1 Protein is suitable for a range of in vitro research applications, including but not limited to:

• ELISA: Use as a standard or capture/detection antigen in sandwich or indirect ELISA formats.
• Western Blot / SDS-PAGE: Use as a positive control for anti-MCEMP1 antibody validation.
• Antibody Production: Use as an immunogen or coating antigen for hybridoma screening.
• Binding / Interaction Studies: Use in pull-down or surface plasmon resonance (SPR) assays to characterize MCEMP1 protein–protein interactions.
• Cell-Based Assays: Use in functional stimulation assays where applicable, following appropriate safety and cell culture guidelines.

Prior to use in critical experiments, researchers are advised to validate the protein in their specific assay system using an appropriate positive control. Record lot numbers and reconstitution details in laboratory notebooks for reproducibility and regulatory compliance.

Frequently asked questions

What is the recommended reconstitution buffer for Recombinant Human MCEMP1 Protein?

The recommended reconstitution buffer is typically sterile PBS (pH 7.4), but this may vary by lot. Always refer to the specific product datasheet supplied with SKU rp365340 for lot-specific reconstitution instructions and volumes.

How should I store Recombinant Human MCEMP1 Protein to maintain its activity?

Store the protein at -80°C in single-use aliquots for long-term stability. For short-term use within 1–2 weeks, storage at 4°C is acceptable. Avoid repeated freeze-thaw cycles, as these can cause protein aggregation and loss of biological activity.

In which assay formats can Recombinant Human MCEMP1 Protein be used?

Recombinant Human MCEMP1 Protein is suitable for ELISA (as standard or antigen), Western blot as a positive control, antibody development as an immunogen, and binding studies such as SPR or pull-down assays. Suitability for specific cell-based functional assays should be validated by the end user.

How do I confirm the quality of Recombinant Human MCEMP1 Protein after reconstitution?

Quality can be confirmed by running the reconstituted protein on SDS-PAGE to verify molecular weight and purity, and by using a BCA or Bradford assay for protein quantification. Functional confirmation using an antibody-based detection method (e.g., Western blot or ELISA) is also recommended.

Is Recombinant Human MCEMP1 Protein suitable for in vivo use?

This product is intended for in vitro research use only and is not approved for human or veterinary diagnostic or therapeutic applications. Any in vivo research use must comply with institutional and regulatory guidelines, and the researcher assumes full responsibility for such use.

References

1. Abcam / AbSea Product Reference: PP-903. Recombinant Human MCEMP1 Protein – product datasheet.
2. UniProt Consortium. MCEMP1_HUMAN – Mast cell-expressed membrane protein 1 (Homo sapiens). UniProtKB.
3. General best practices for recombinant protein handling and storage. Textbook-level biochemistry guidance; no specific citation available.

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.