Anti-MBP Tag Mouse Monoclonal Antibody (9Y5)

MBP tag (maltose-binding protein) is used to improve solubility and support purification of recombinant proteins. Anti-MBP antibodies are mainly used for detecting MBP-fusion proteins and tracking expression/purification.

Why buyers use anti-MBP

• WB detection: Confirms expression of MBP-fusion proteins and checks expected size.
• Purification tracking: Helps identify MBP-tagged protein in different purification fractions.
• Solubility workflow support: Useful when MBP is used specifically to improve protein solubility.

When to consider another approach

• Large tag size: MBP adds ~42 kDa, so fusion proteins run significantly larger than the native target.
• Tag removal workflows: if MBP is cleaved off, confirm whether you want to detect the tag or the final protein.

Clone 9Y5 is the unique monoclonal antibody clone designation for this product. If you previously used a MBP Tag antibody labeled “9Y5,” this clone number is the key identifier that helps you select the same antibody lineage for better experiment-to-experiment consistency.

What “Clone 9Y5” tells you (and what it doesn’t)

• It tells you: this antibody comes from a single monoclonal clone (9Y5), meaning the antibody population is uniform and targets one dominant epitope/epitope region.
• It does not guarantee: identical performance across all suppliers, because formulation, purification, conjugation, and validation standards can differ even when the clone number matches.

When choosing Clone 9Y5 is especially helpful

• Replacing an antibody: If your previous antibody was “MBP Tag (Clone 9Y5),” matching the clone is the best first step to keep band patterns and background similar.
• Protocol/paper matching: Many published protocols specify the clone. Using the same clone reduces variability when reproducing literature results.
• Standardization across projects: Clone-based standardization is useful when multiple people or sites run the same workflows.

Buyer checks before committing

• Application validation: Confirm Clone 9Y5 is validated for your intended assay(s) listed on the product page (e.g., WB vs IF/IHC vs IP).
• Specificity expectations: Review validation images (if available) and confirm the expected signal pattern for your sample type.
• Plan controls: If you are switching from a different clone, run side-by-side comparisons and include positive/negative controls to confirm specificity and background.

For WB, the apparent band size depends on your fusion protein (tag + protein of interest) and sample conditions.

Tip: If you need faster WB or IP workflows, look for HRP- or bead-conjugated formats of the same clone when available.

Monoclonal antibodies are produced from a single B-cell clone and recognize one dominant epitope/epitope region on the target. They are often chosen for their consistent performance and lot-to-lot reproducibility.

Why buyers choose monoclonal antibodies

• Reproducibility: More consistent results across experiments and over time.
• Specificity: Typically cleaner signals when the epitope is well exposed.
• Standardization: Easier to match literature protocols when a clone is specified.

When to consider another option

• if the target epitope is masked by fixation, folding, or complex formation
• if you need broader recognition across isoforms or modified forms of the protein

In these cases, a polyclonal antibody can sometimes provide stronger overall signal because it recognizes multiple epitopes.

Application(s) indicate which experimental methods this antibody has been tested/validated for. Choosing an antibody validated for your specific method is one of the best ways to reduce troubleshooting.

What the listed application(s) mean

• Western blot (WB): Detects proteins in denatured samples separated by gel electrophoresis; ideal for confirming size and expression changes.

Buyer guidance

• Match your workflow: If your main use is WB, IF, IHC-P, or IP, prioritize antibodies validated for that exact application.
• Sample prep matters: Fixation, permeabilization, antigen retrieval, and lysis buffer can change epitope accessibility and background.
• Use controls: Include positive/negative controls and, when possible, compare with a known antibody or sample.

Host refers to the species in which the primary antibody was raised (here: Mouse). Host selection mainly affects which secondary antibody you should use and can influence background in certain sample types.

Why buyers care about the host

• Secondary antibody matching: Choose an anti-mouse secondary (e.g., anti-mouse IgG) with the right conjugate for your detection method.
• Background control: If your sample contains endogenous immunoglobulins from the same species as the host, background can increase (common in some tissue IHC workflows).
• Multiplex design: Using primaries from different host species helps avoid cross-reactivity in multi-target staining.

When to take extra care

• Mouse-on-mouse IHC/IF (mouse primary on mouse tissue) can increase background; consider mouse-on-mouse kits, highly cross-adsorbed secondaries, or alternative host species.
• For complex staining panels, use cross-adsorbed secondaries and include no-primary controls to check nonspecific binding.

Reactivity describes which species the antibody is expected to recognize based on validation and/or target sequence conservation. Reported reactivity for this product includes: Mammals, Bacteria.

Why buyers should check reactivity

• Species compatibility: Make sure your sample species is included in the reported reactivity list before ordering.
• Sequence conservation: Even when species are closely related, small sequence differences can affect binding (especially for monoclonals).
• Sample context: Tissue type, expression level, and sample prep can influence whether reactivity translates into a clean signal.

Buyer guidance

• If your species is not listed, consider requesting additional validation or testing a small pilot first.
• Use a positive control sample from a listed species whenever possible to confirm performance.
• For tag antibodies (e.g., GFP/HA/FLAG), reactivity often reflects where the tag is used rather than a native species protein—fusion design and expression level still matter.

Unconjugated primary antibodies are supplied without a detection label. This is the most flexible format and can be paired with different secondary antibodies (HRP, fluorophores, biotin, etc.) depending on your assay.

Why buyers choose unconjugated antibodies

• Maximum flexibility: Use the same primary with different detection systems across WB, IF, or IHC.
• Signal tuning: Choose a secondary antibody that matches your sensitivity and multiplex needs.
• Cost efficiency: One primary can support multiple workflows by switching secondaries.

When to consider a conjugated format

• If you want fewer steps and faster WB, consider an HRP-conjugated primary.
• If your main workflow is IP/Co-IP, bead-conjugated formats (agarose or magnetic beads) can simplify pull-down and reduce background.