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Refine dab

Manufactured by Leica

Refine DAB is a high-quality reagent used in immunohistochemistry (IHC) for the visualization of target proteins in tissue sections. It provides a sensitive and specific chromogenic detection system.

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2 protocols using refine dab

1

Immunohistochemical Analysis of GFP Expression

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Brains were removed, fixed in 10% formalin and embedded in paraffin. Four-micron coronal brain sections were stained with “Leica Bond Rx” (Leica Biosystems, Buffalo Grove, IL). Slides undergoing GFP analyses were pretreated with H2 antigen retrieval buffer for 35 min. Endogenous peroxidase was blocked with 3% hydrogen peroxide for 5 min. A TCT protein block was applied for 10 min (0.05 M Tris, 0.15 M NaCl, 0.25% Casein, 0.1% Tween 20, pH 7.6) and incubated with Anti-GFP antibody (1:1000, Invitrogen; A11122) for 60 min. All antibodies were then detected using Leica Power Vision HRP rabbit-specific polymer (Leica Biosystems; DS9800) for 12 min. Nuclear-specific staining was visualized with “Refine DAB” (Leica Biosystems; DS9800). A hematoxylin counterstain was then applied. Isotype negative control antibody-exposed slides were included as controls.
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2

Immunohistochemical Analysis of Lymph Nodes

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Formalin-fixed, paraffin-embedded lymph node samples were stained on a Leica Bond Rx system with antibodies against CD3 (3 μg/ml, Serotec MCA1477), MAC 387 (0.2 μg/ml, Dako M0747), and cleaved caspase-3 (0.3 μg/ml, Biocare Medical CP229B) after ethylenediaminetetraacetic acid (EDTA)-based antigen retrieval. The CD3 antibody was followed by a rabbit anti-rat secondary, all antibodies were then detected and visualized using Power Vision HRP polymers and Refine DAB (Leica Biosystems). Slides were scanned using an Aperio AT scanscope system (Leica) with 40× image capture magnification and analyzed using the ImageScope viewing software.
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