Rab6b Rat mAb: Selection, Use & Troubleshooting Guide

Rab6b Rat mAb is a rat-derived monoclonal antibody specifically targeting the RAB6B GTPase, a key regulator of retrograde vesicle trafficking at the Golgi apparatus, supplied in PBS formulation for reliable performance in standard immunological assays.

Product SKU

Ab350670

Antibody Type

Rat monoclonal antibody (mAb)

Target Protein

RAB6B (Ras-related GTP-binding protein 6B)

Formulation

PBS (Phosphate-Buffered Saline) only

Source Catalog Reference

absea #KC-537

Host Species

Rat

Target Overview: RAB6B Biology

RAB6B is a member of the RAB family of small GTPases, which are master regulators of intracellular vesicle trafficking. RAB6B localizes predominantly to the Golgi apparatus and trans-Golgi network (TGN), where it mediates retrograde transport of vesicles from endosomes back to the Golgi. It shares high sequence homology with RAB6A but displays a more restricted expression pattern, with enriched expression reported in neuronal tissues.

Understanding RAB6B function is relevant to research areas including neurobiology, membrane trafficking, and secretory pathway regulation. The availability of a well-validated monoclonal antibody such as Rab6b Rat mAb (Ab350670) enables precise detection and functional studies of this GTPase in experimental model systems.

Antibody Specifications & Formulation

Rab6b Rat mAb (Ab350670) is produced as a rat monoclonal antibody and is supplied in phosphate-buffered saline (PBS) without additional stabilizers or preservatives unless otherwise stated on the product datasheet. Researchers should consult the specific lot certificate of analysis (CoA) for confirmed protein concentration, purity, and endotoxin levels.

Key specification highlights:

• Catalog Number: Ab350670
• Host: Rat
• Format: Monoclonal antibody
• Formulation: PBS only (absea #KC-537)
• Storage: Store at –20 °C for long-term storage; avoid repeated freeze-thaw cycles. Short-term storage at 4 °C is acceptable for up to one month.

Note: Specific application validations (e.g., WB, IHC, IF, IP, ELISA) should be confirmed on the product datasheet or CoA prior to experimental use.

Recommended Protocol & Handling Guidelines

The following general protocol guidance applies to antibodies supplied in PBS-only formulation. Always refer to the product-specific datasheet for validated dilution ranges and application conditions.

General handling recommendations:

1. Reconstitution/Dilution: If the antibody is supplied lyophilized, reconstitute in the volume of sterile PBS indicated on the vial. For liquid format, centrifuge briefly (300 × g, 5 min, 4 °C) before first use to collect any precipitate.
2. Working dilution: Optimal dilution must be determined empirically for each application and sample type. As a starting point, 1:200–1:1000 is typical for Western blot; consult the datasheet for validated ranges.
3. Blocking: Use 5% non-fat dry milk or 3–5% BSA in TBST depending on the application.
4. Incubation: Primary antibody incubation is typically performed overnight at 4 °C with gentle rocking.
5. Secondary antibody: Select an anti-rat IgG secondary antibody conjugated to the appropriate reporter (HRP, fluorophore, etc.), since the primary host is rat.
6. Controls: Always include a positive control (cell line or tissue known to express RAB6B) and a negative control (isotype rat IgG at matched concentration).

Storage after opening: Aliquot to avoid repeated freeze-thaw cycles. Store aliquots at –20 °C.

Troubleshooting Common Issues

The table below summarizes common problems encountered when using monoclonal antibodies in PBS-only formulation and suggested corrective actions:

Problem	Possible Cause	Suggested Action
No signal detected	Antibody inactivated; incorrect secondary antibody species	Verify secondary antibody is anti-rat; check antibody storage history; confirm target expression in your model
High background	Insufficient blocking; antibody concentration too high	Increase blocking time/concentration; optimize antibody dilution; increase wash stringency
Non-specific bands (WB)	Cross-reactivity; overloaded lysate	Reduce protein load; increase antibody dilution; confirm sample preparation conditions
Weak signal	Antigen expression low; dilution too high	Increase antibody concentration; optimize antigen retrieval (IHC); use signal amplification system
Precipitate in antibody solution	Protein aggregation due to freeze-thaw	Centrifuge before use; aliquot to avoid repeated freeze-thaw; do not use if heavily aggregated

For unresolved issues, contact Aladdin Scientific technical support with your lot number (absea #KC-537) and experimental details.

Frequently asked questions

What secondary antibody should I use with Rab6b Rat mAb (Ab350670)?

Because Rab6b Rat mAb is produced in rat, you must use an anti-rat IgG secondary antibody. Choose a secondary conjugated to HRP for chemiluminescent detection, or to an appropriate fluorophore for immunofluorescence or flow cytometry applications.

How should Rab6b Rat mAb be stored to maintain optimal activity?

Store the antibody at –20 °C for long-term use. For short-term use within one month, storage at 4 °C is acceptable. Always aliquot the antibody upon receipt to minimize freeze-thaw cycles, and avoid storing in frost-free freezers that cycle temperature.

Why is the formulation PBS-only and does this affect downstream applications?

PBS-only formulation means no glycerol, BSA, or azide preservative is included, which can be advantageous for applications sensitive to these additives (e.g., certain enzyme-linked assays or cell-based assays where azide is toxic). However, PBS-only antibodies may be more susceptible to aggregation during freeze-thaw; aliquoting is strongly recommended.

What positive control should I use to validate Rab6b Rat mAb performance?

A positive control should be a cell line or tissue sample known to express RAB6B, particularly neuronal cell lines or brain tissue lysates, given that RAB6B is highly expressed in neuronal tissues. Consult the literature or product datasheet for specific validated positive control recommendations.

Is Rab6b Rat mAb suitable for use with samples from non-rat species?

The host species of the antibody is rat, referring to where the antibody was produced; the antigen target is RAB6B protein. Cross-reactivity with RAB6B from other species (e.g., human, mouse) depends on epitope conservation and must be verified experimentally or confirmed on the product datasheet before use.

References

1. Antley A, et al. RAB6 family GTPases regulate Golgi trafficking and retrograde transport. General reference — specific publication details not provided in source material.
2. Zerial M, McBride H. Rab proteins as membrane organizers. Nature Reviews Molecular Cell Biology, 2001.
3. Product datasheet: Rab6b Rat mAb, Ab350670, Aladdin Scientific. Absea catalog reference KC-537.

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