Recombinant Human GLIPR1L1 Protein: Handling & Usage Protocol

Recombinant Human GLIPR1L1 protein is a research-grade reagent requiring careful reconstitution, controlled storage, and validated handling procedures to maintain full biological activity in downstream experimental applications.

Product Name

Recombinant Human GLIPR1L1 protein

SKU

rp367970

Species

Human (Homo sapiens)

Protein Family

GLIPR1 / CAP superfamily (cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1)

Recommended Storage

Store lyophilized protein at -20°C to -80°C; avoid repeated freeze-thaw cycles

Reconstitution

Reconstitute in sterile deionized water or PBS to the recommended concentration; consult product datasheet for exact volume

Intended Use

For research use only; not for diagnostic or therapeutic applications

Background: GLIPR1L1 and Its Biological Significance

GLIPR1L1 (GLI Pathogenesis-Related 1 Like 1) is a member of the CAP superfamily, which encompasses cysteine-rich secretory proteins (CRISPs), antigen 5 proteins, and pathogenesis-related proteins of the PR-1 type. Proteins in this family are characterized by a conserved CAP domain and have been implicated in diverse biological processes including immune regulation, cell adhesion, and reproductive biology.

GLIPR1L1 is predominantly expressed in testicular tissue and has been associated with sperm function and male fertility research. Recombinant expression of GLIPR1L1 enables researchers to investigate its molecular interactions, receptor-binding properties, and downstream signaling pathways in a controlled in vitro setting. Aladdin Scientific's Recombinant Human GLIPR1L1 protein (rp367970) is produced to support these research applications.

Reagents, Equipment, and Safety Precautions

Required reagents:

• Recombinant Human GLIPR1L1 protein (rp367970, Aladdin Scientific)
• Sterile, deionized water or phosphate-buffered saline (PBS, pH 7.4)
• Carrier protein (e.g., 0.1% BSA) if required for long-term stability — consult the product datasheet
• Appropriate assay buffers as required by the downstream application

Required equipment:

• Calibrated micropipettes and sterile tips
• Microcentrifuge tubes (low-binding recommended)
• -20°C or -80°C freezer for storage
• Vortex mixer and microcentrifuge

Safety precautions:

• Handle all recombinant proteins using standard laboratory safety practices (lab coat, gloves, eye protection).
• This product is for research use only and must not be administered to humans or animals.
• Consult the Safety Data Sheet (SDS) prior to use.

Step-by-Step Reconstitution and Handling Protocol

Step 1 — Equilibration: Remove the vial from storage and allow it to equilibrate to room temperature for 10–15 minutes before opening to minimize condensation and protein aggregation.

Step 2 — Centrifugation: Briefly centrifuge the vial (e.g., 5–10 seconds at low speed) to collect any lyophilized material from the sides and cap of the vial.

Step 3 — Reconstitution: Add the recommended volume of sterile reconstitution buffer (deionized water or PBS, pH 7.4) directly to the lyophilized cake. Refer to the product datasheet (absea#PQ-607) for the precise volume and recommended final concentration. Gently swirl or pipette to mix; do not vortex vigorously to avoid denaturation.

Step 4 — Complete dissolution: Allow the reconstituted solution to stand at room temperature for 5–10 minutes with occasional gentle mixing until the protein is fully dissolved and the solution is clear.

Step 5 — Aliquoting: Prepare single-use aliquots in low-binding microtubes immediately after reconstitution to avoid repeated freeze-thaw cycles, which can compromise protein integrity and activity.

Step 6 — Storage of aliquots: Snap-freeze aliquots in liquid nitrogen or on dry ice and store at -80°C for long-term use, or at -20°C for short-term use. Do not store at 4°C for extended periods.

Step 7 — Thawing: Thaw aliquots on ice or at 4°C immediately before use. Gently mix after thawing; centrifuge briefly if precipitate is visible and assess clarity before proceeding.

Quality Control and Verification

Before committing the reconstituted protein to critical experiments, researchers are encouraged to perform the following quality control checks:

• Visual inspection: The reconstituted solution should be clear and free from visible particles or turbidity. Discard the lot if significant aggregation or precipitation is observed.
• Protein concentration: Measure the protein concentration using a validated method (e.g., BCA assay, Bradford assay, or A280 absorbance) and compare to the expected concentration stated on the Certificate of Analysis (CoA).
• SDS-PAGE / Western blot: Verify molecular weight and purity by running an aliquot on SDS-PAGE (reducing or non-reducing conditions as appropriate) and, if required, confirm identity by Western blot using a validated anti-GLIPR1L1 antibody.
• Bioactivity assay: Where a validated functional assay is available for GLIPR1L1, include a positive control to confirm retained biological activity after reconstitution.

Record all QC results in a laboratory notebook or electronic lab record system and retain the CoA and SDS for traceability.

Downstream Applications and Troubleshooting

Recommended applications: Recombinant Human GLIPR1L1 protein is suitable for use in a range of in vitro research applications, including but not limited to:

• ELISA (as standard or capture/detection antigen)
• Western blot (as positive control)
• Cell-based functional assays
• Protein–protein interaction studies (e.g., co-immunoprecipitation, SPR, pull-down assays)
• Structural studies

Always refer to the product datasheet for validated applications and recommended working concentrations.

Troubleshooting guide:

Problem	Possible Cause	Recommended Action
Precipitation after reconstitution	Incompatible buffer, incorrect pH, or protein aggregation	Centrifuge briefly, change to recommended buffer, ensure correct pH; check storage history
Low activity in functional assay	Repeated freeze-thaw cycles or improper storage	Use freshly thawed single-use aliquots; verify storage conditions
Unexpected band size on SDS-PAGE	Glycosylation, tags, or non-reducing conditions	Compare to CoA; run under both reducing and non-reducing conditions
Inconsistent results between lots	Lot-to-lot variability or assay sensitivity	Run parallel controls; contact Aladdin Scientific technical support

Frequently asked questions

What buffer should I use to reconstitute Recombinant Human GLIPR1L1 protein?

We recommend reconstituting in sterile deionized water or PBS (pH 7.4) as detailed in the product datasheet (absea#PQ-607). For long-term stability, adding a carrier protein such as 0.1% BSA may be beneficial. Always consult the Certificate of Analysis supplied with your specific lot for precise instructions.

How should I store Recombinant Human GLIPR1L1 protein to maintain its activity?

Store the lyophilized protein at -20°C to -80°C in a dry environment. After reconstitution, prepare single-use aliquots and store at -80°C for long-term use. Avoid repeated freeze-thaw cycles, as these can significantly reduce protein activity and integrity.

What applications is Recombinant Human GLIPR1L1 protein validated for?

This recombinant protein is suitable for in vitro research applications including ELISA, Western blot (as a positive control), protein–protein interaction studies, and cell-based functional assays. Please refer to the product datasheet for the full list of validated applications and recommended working concentrations, as these may vary by lot.

Can Recombinant Human GLIPR1L1 protein be used in vivo or for therapeutic purposes?

No. This product is strictly for research use only and must not be used for diagnostic, therapeutic, or in vivo applications in humans or animals. It does not meet the purity and safety standards required for clinical or veterinary use.

Who should I contact if I experience technical difficulties with this product?

Please contact the Aladdin Scientific technical support team, providing your lot number, the CoA, and a description of the issue encountered. Our team will assist you in troubleshooting or, if appropriate, arrange a replacement under our returns and refunds policy.

References

1. Abcam / Absea product datasheet absea#PQ-607 for Recombinant Human GLIPR1L1 protein. Refer to the manufacturer's documentation for full specification details.
2. Gibbs GM, Roelants K, O'Bryan MK. The CAP superfamily: cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 proteins — roles in reproduction, cancer, and immune defense. Endocrine Reviews. 2008;29(7):865-897. doi:10.1210/er.2008-0032

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