Recombinant RAB6B Antibody: Selection & Usage Guidelines

Recombinant RAB6B Antibody is a highly specific reagent designed to detect RAB6B protein, a member of the Rab GTPase family involved in Golgi-to-endoplasmic-reticulum vesicular trafficking, enabling reliable results across multiple immunoassay platforms.

SKU

Ab349238

Product Type

Recombinant Monoclonal Antibody

Target Protein

RAB6B (Ras-related protein Rab-6B)

Antibody Format

Recombinant (sequence-defined, animal-free production)

Recommended Applications

Western Blot (WB), Immunohistochemistry (IHC), Immunofluorescence (IF)

Reference Clone / Catalog Source

absea #RN-096

Background: RAB6B Biology and Research Relevance

RAB6B is a member of the Rab family of small GTPases, a group of proteins that regulate intracellular membrane trafficking and vesicle transport. RAB6B shares high sequence homology with RAB6A and is predominantly expressed in neuronal tissues, where it plays a role in retrograde trafficking from the Golgi apparatus back to the endoplasmic reticulum (ER). Dysregulation of RAB6B-mediated transport pathways has been implicated in neurodegenerative processes and neuronal development, making it an important target for cell biology and disease-model research.

Because RAB6B and RAB6A share substantial sequence similarity, antibody cross-reactivity is a known concern. The Recombinant RAB6B Antibody (Ab349238) is engineered with a defined sequence to maximize specificity for RAB6B over closely related isoforms, supporting confident target identification in complex biological samples.

Antibody Specifications and Storage Guidelines

The Recombinant RAB6B Antibody (Ab349238), sourced with reference to absea clone RN-096, is produced using recombinant expression technology, ensuring lot-to-lot consistency and eliminating variability associated with traditional hybridoma or animal immunization methods. Key handling recommendations include:

• Storage Temperature: Store at −20°C for long-term storage. Avoid repeated freeze-thaw cycles, which can reduce antibody activity.
• Aliquoting: Upon first thaw, prepare single-use aliquots to preserve antibody integrity.
• Working Concentration: Optimal dilutions should be determined empirically for each application and sample type. Typical starting dilutions for WB are 1:500–1:2000; for IHC and IF, 1:50–1:200 is a common starting range.
• Reconstitution: If supplied lyophilized, reconstitute in the manufacturer-recommended volume of sterile PBS or diluent and allow to equilibrate before use.

Note: Specific storage buffer composition, exact concentration, and supplied volume should be confirmed from the product datasheet (Ab349238). These parameters are flagged for review.

Step-by-Step Protocol for Western Blot (WB)

The following protocol provides a general workflow for using Recombinant RAB6B Antibody (Ab349238) in Western Blot applications. Optimize conditions empirically for your specific cell or tissue lysate.

1. Sample Preparation: Lyse cells or homogenize tissue in RIPA buffer supplemented with protease inhibitors. Determine protein concentration using a BCA or Bradford assay. Load 20–40 µg total protein per lane.
2. SDS-PAGE: Separate proteins on a 12–15% SDS-PAGE gel. RAB6B has an apparent molecular weight of approximately 23–25 kDa.
3. Transfer: Transfer proteins to a PVDF or nitrocellulose membrane using wet or semi-dry transfer conditions.
4. Blocking: Block membrane for 1 hour at room temperature in 5% non-fat dry milk or 3–5% BSA in TBST (for phospho-targets, BSA blocking is preferred).
5. Primary Antibody Incubation: Dilute Ab349238 at the recommended starting ratio (e.g., 1:1000) in blocking buffer. Incubate overnight at 4°C with gentle agitation.
6. Washing: Wash membrane 3 × 10 minutes with TBST.
7. Secondary Antibody: Incubate with appropriate HRP-conjugated secondary antibody (anti-species) for 1 hour at room temperature.
8. Detection: Develop using ECL substrate and image using a chemiluminescence imager or X-ray film.
9. Expected Band: A specific band at approximately 23–25 kDa is expected for RAB6B. Verify with positive control lysate (e.g., brain tissue lysate) and a negative control.

Note: The exact molecular weight of RAB6B should be confirmed from the UniProt entry or the product datasheet; the value cited here is textbook-level and is flagged for verification.

Troubleshooting Common Issues

The table below summarizes frequent problems encountered when using the Recombinant RAB6B Antibody and recommended corrective actions:

Problem	Likely Cause	Recommended Action
No signal / weak band	Antibody concentration too low; inadequate antigen retrieval (IHC); protein degradation	Increase antibody concentration; optimize antigen retrieval (heat-induced, citrate buffer pH 6.0); use fresh protease inhibitors during lysis
High background	Insufficient blocking; antibody concentration too high; inadequate washing	Increase blocking time or concentration; titrate antibody down; increase number or duration of wash steps
Multiple non-specific bands (WB)	Cross-reactivity with RAB6A or other Rab isoforms; sample overloading	Reduce protein loading; validate specificity using RAB6B knockout or knockdown cell lysate as negative control
Inconsistent results between lots	Freeze-thaw degradation	Aliquot upon first thaw; store at −20°C; avoid repeated freeze-thaw cycles

Experimental Validation and Controls

Rigorous experimental controls are essential for interpreting results obtained with any antibody reagent. For Recombinant RAB6B Antibody (Ab349238), we recommend the following validation strategy:

• Positive Control: Use a cell line or tissue known to express RAB6B. Neuronal cell lines or brain tissue lysate are appropriate positive controls given RAB6B's enriched neuronal expression.
• Negative Control: Include a RAB6B-knockout (KO) or siRNA-knockdown lysate to confirm band specificity. Omission of primary antibody serves as a secondary antibody control.
• Recombinant Protein Control: Run recombinant RAB6B protein alongside biological samples to confirm detection at the correct molecular weight.
• Cross-Reactivity Check: Where isoform specificity is critical, compare signal in RAB6A-expressing versus RAB6B-expressing samples side-by-side.
• Loading Control: Use a housekeeping protein (e.g., GAPDH, beta-actin, or alpha-tubulin) to normalize lane loading in WB experiments.

Documenting these controls in every experiment ensures data integrity and supports downstream publication or regulatory submission requirements.

Frequently asked questions

What applications is the Recombinant RAB6B Antibody (Ab349238) validated for?

The Recombinant RAB6B Antibody (Ab349238) is recommended for Western Blot (WB), Immunohistochemistry (IHC), and Immunofluorescence (IF) applications. Users should validate optimal dilutions empirically for their specific sample types and experimental conditions.

How should I differentiate RAB6B from RAB6A using this antibody?

RAB6A and RAB6B share high sequence homology, which can lead to cross-reactivity with non-specific antibodies. The Recombinant RAB6B Antibody (Ab349238) is sequence-defined to maximize RAB6B specificity. To confirm isoform-specific detection, run RAB6A-expressing and RAB6B-expressing samples in parallel, and validate using a RAB6B-knockout lysate as a negative control.

What is the recommended storage condition to maintain antibody activity?

Store the Recombinant RAB6B Antibody at −20°C for long-term preservation. To avoid activity loss, aliquot the antibody upon first thaw into single-use volumes and minimize freeze-thaw cycles. Short-term storage at 4°C is acceptable if the antibody will be used within a few days.

Which positive control sample is most suitable for RAB6B detection?

Given that RAB6B is predominantly expressed in neuronal tissues, brain tissue lysate or neuronal cell lines are the most appropriate positive control samples. Using well-characterized positive controls ensures that the assay is working correctly before testing unknown samples.

Why is a recombinant antibody preferred over a conventional polyclonal antibody for RAB6B research?

Recombinant antibodies are produced from a defined sequence, ensuring superior lot-to-lot reproducibility, batch consistency, and long-term supply continuity without the need for animal immunization. For targets like RAB6B where isoform specificity is critical, recombinant antibodies provide greater assurance of selectivity compared to polyclonal preparations that may contain a mixture of antibodies with varying specificities.

References

1. Goud B, Zahraoui A, Tavitian A, Saraste J. Small GTP-binding protein associated with Golgi cisternae. Nature. 1990;345(6275):553–556. doi:10.1038/345553a0
2. Antony C, Huchet M, Changeux JP, Cartaud J. Developmental regulation of membrane traffic organization during synaptogenesis in mouse diaphragm muscle. J Cell Biol. 1995;130(4):959–968.
3. absea Biotechnology. RN-096 Recombinant RAB6B Antibody product documentation. absea.com.

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