wo-step polymer detection kits provide enhanced sensitivity and flexibility for immunohistochemistry (IHC) in rat tissues. They are ideal for detecting low-abundance antigens where background staining or limited signal can affect results.

Principle

The system uses a primary antibody (user-supplied) followed by a polymer-conjugated secondary antibody carrying multiple enzyme molecules (HRP or AP). This two-step amplification improves signal intensity while minimizing non-specific staining.

Advantages

• High sensitivity: amplifies weak antigen signals for clearer visualization.

• Species-specific adsorption: secondary antibodies can be adsorbed against rat, rabbit, or human serum to reduce cross-reactivity.

• Versatile sample compatibility: works with frozen sections, paraffin-embedded tissues, or cell smears.

• Flexible detection: available in HRP/DAB or AP chromogens, enabling multiplex staining.

Applications

Widely used in preclinical research, neuroscience, immunology, and toxicologic pathology. Two-step polymer kits are particularly useful when 1-step systems provide insufficient sensitivity or when multiplex detection requires sequential amplification.