Anti-MED12 antibody (1981-1994) (STJ72605)

What it means: Polyclonal antibodies are produced by multiple B-cell clones, each recognizing a distinct epitope on the target protein — giving Polyclonal antibodies a broad epitope coverage.

Why it matters:

• Polyclonal antibodies typically deliver stronger signal in Western blot and IHC because multiple epitopes remain accessible even after SDS denaturation or fixation, reducing the risk of a false-negative result.
• Greater tolerance for antigen sequence variation across species makes Polyclonal reagents well-suited for studies that span human, mouse, and rat samples in the same experiment.

How to interpret here: Expect robust, high-sensitivity detection with this Polyclonal antibody. Because multiple clones contribute to the signal, titrate carefully — the optimal concentration may be lower than expected. Lot-to-lot variation is possible; validate each lot against a known-positive control.

What it means: This antibody was raised in Goat, producing Goat-derived IgG antibodies with species-specific secondary antibody compatibility.

Why it matters:

• The Goat host species determines which secondary antibody you need for indirect detection — select an anti-Goat IgG secondary matched to your detection label (HRP, fluorochrome, or biotin).
• Use secondaries specifically validated for Goat IgG. Verify cross-adsorption status if your sample matrix contains endogenous Goat immunoglobulins.

How to interpret here: Confirm availability of an anti-Goat secondary antibody in your lab before ordering. For multiplex IF, pair this Goat-raised antibody with antibodies from a different host species to avoid secondary antibody cross-reactivity.

What it means: Validated reactivity to Human/Mouse/Rat/Dog/Pig/Cow — this antibody cross-reacts with orthologs from multiple species within a single reagent.

Why it matters:

• Cross-species reactivity (Human/Mouse/Rat/Dog/Pig/Cow) allows direct comparison of the same target across Human, Mouse, Rat, Dog, Pig and Cow experimental models without switching antibodies, eliminating an important source of inter-study variability.
• All listed reactivities are experimentally confirmed, not computationally predicted — critical for reviewers and reproducibility standards.

How to interpret here: Confirm that your specific species is among the validated list (Human/Mouse/Rat/Dog/Pig/Cow). Reactivity to unlisted species should be independently validated before use in publication-quality data.

What it means: Unconjugated format means no detection label is attached to this antibody — you supply a compatible secondary antibody or detection reagent of your choice.

Why it matters:

• The Unconjugated format gives maximum flexibility: pair with HRP-, fluorochrome-, or biotin-conjugated secondary antibodies matched to your detection platform, enabling use across WB, IHC, IF, and ELISA without ordering separate conjugated primary formats.
• Signal amplification is possible by using a biotinylated secondary followed by a streptavidin-enzyme conjugate, which is not available with directly conjugated primary antibodies.

How to interpret here: Select an anti-host-species secondary antibody conjugated to your preferred detection label. For most indirect detection workflows, the Unconjugated primary antibody is the recommended starting format.

What it means: IgG is the immunoglobulin class and subclass of this antibody, defining its constant-region structure and effector functions.

Why it matters:

• Isotype IgG determines which secondary antibody constant-region specificities are compatible — isotype-specific anti-IgG1 or anti-IgG2a secondaries enable discrimination of co-stained antibodies from the same host species in multiplex experiments.
• For functional assays, isotype identity guides selection of Fc-receptor binding controls and isotype-matched negative controls required for rigorous experimental design.

How to interpret here: Use a negative control of the same isotype (IgG) to assess non-specific binding in your assay. If performing multiplex staining with multiple antibodies from the same species, select isotype-specific secondary antibodies to resolve each IgG signal independently.

What it means: Purified from goat serum by ammonium sulphate precipitation followed by antigen affinity chromatography using the immunizing peptide. indicates the chromatographic method used to isolate this antibody from the production matrix, ensuring a defined purity level.

Why it matters:

• Purified from goat serum by ammonium sulphate precipitation followed by antigen affinity chromatography using the immunizing peptide. removes bulk serum proteins that could cause non-specific binding or elevated background in downstream assays — a critical quality attribute for immunoassay performance.
• The Purified from goat serum by ammonium sulphate precipitation followed by antigen affinity chromatography using the immunizing peptide. process is routinely validated and documented by the manufacturer as part of QC release, providing traceability for GLP-adjacent studies.

How to interpret here: Confirm the purity specification on the Certificate of Analysis. For the most demanding applications (single-cell IF, proximity ligation), Purified from goat serum by ammonium sulphate precipitation followed by antigen affinity chromatography using the immunizing peptide. purity is the recommended minimum standard.

What it means: This antibody has been experimentally validated for 1 application: ELISA.

Why it matters:

• ELISA
• Each listed application represents an independently optimized protocol — not a theoretical prediction — giving you confidence that the antibody will perform reliably when used at the recommended conditions for that technique.

How to interpret here: Select the application that matches your assay (ELISA) and refer to the datasheet for the validated dilution range specific to each technique. Using this antibody outside the listed validated applications requires independent optimization and performance verification.