The HRP/DAB detection system is primarily designed for use with paraffin-embedded tissue sections. While it may also be applicable to frozen sections, successful performance largely depends on the compatibility of the primary antibody with frozen tissue. If the primary antibody is validated for use in frozen sections, it can typically be detected effectively using the HRP/DAB secondary detection system.
As per our datasheet link below:
DAB150 IHC Select® HRP/DAB is intended for use with the MILLIPORE IHC Select® Prediluted Primary
Antibody reagents which contain rabbit and/or mouse IgG for the qualitative identification of antigens by light microscopy in paraffin-embedded tissues. Endogenous avidin-binding activity (EABA) has been noted in frozen sections of liver (entire hepatic nodule) and kidney (tubular epithelium), as well as in frozen and formalin-fixed lymphoid tissues (paracortical histiocytes)21,22. When the potential presence of EABA is of concern to interpretation, it may be suppressed by sequential 20-minute incubations,
first with 0.1% avidin and then with 0.01% biotin in 0.05M Tris-HCl buffer, pH 7.2-7.6 prior to initiating the staining run.
https://www.sigmaaldrich.com/US/en/deepweb/assets/sigmaaldrich/product/documents/559/190/dab150-500.pdf






