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Double staining for Ag and Ki-67, TUNEL or BCL-6.
Cut frozen tissue sections (spleen, lymph nodes) in a cryostat at~ 4µm, on plain glass slides (Adhesive -coated slides are sometimes too hydrophobic, but fine if you have them).1- Fix the sections in 10% buffered formalin for 10 min. at RT.10- add the HRP-conjugated Goat anti rabbit (Vector 50 to 100 µl, dilution 1:100) and incubate for 30’.Use tyramide amplification hereContinueBiotin-conjugated secondary Ab choice:
10- add the biotin-conjugated goat anti-rabbit (50 to 100 µl, dilution 1:200) and incubate for 30 min.
12 -add the HRP-conjugated avidin (50 to 100 µl, dilution 1:300 -500) and incubate for 20 min. Be careful not to dilute the avidin in biotin-containing medium.11 -fix in absolute methanol RT for 10 min. Warning: methanol dissolves AEC and blocks HRP. Do this step only after biotin-secondary or tyramide-biotin.19- apply the diluted antibody (BLC-6, Ki-67, others)
20- wash twice in TBS-T
21- counterstain with an AP-conjugated secondary antib