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3 protocols using anti ki 67 clone b56

1

Activation-Induced Marker (AIM) Staining of Antigen-Specific T Cells

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After peptide stimulation, the cells were washed with PBS containing 5% FCS and stained with amine-reactive viability stain (Live/dead fixable aqua dead cell stain kit; Invitrogen) for 30 min at 4°C. After washing, pMHC-spheromers were added to screen the epitope-specific CD8+ and CD4+ T cells. Meanwhile, the antibody cocktail was added for AIM staining (anti-CD69 (clone FN50, Biolegend), anti-CD154 (clone 24-31, Biolegend), anti-CD137 (clone 4B4-1, Biolegend), anti-CD38 (clone HIT2, BD Biosciences) and anti-Ki-67 (clone B56, BD Biosciences)). The cells were stained for 30 min at 4°C in 100μl volume.
Cells were then washed twice with staining buffer before acquisition using BD LSRII flow cytometer. The data was analyzed using FlowJo (v10) software.
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2

Immunofluorescence Analysis of SDHB and Ki67

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Cells were seeded on cover slips (ø 18 mm; Thermo Scientific) and cultured as described. Immunofluorescence staining was performed as previously described [39 (link)]. The following antibodies were used: 1.7 µg/mL anti-SDHB (clone EPR10880, Abcam), 10 µg/mL anti-Ki67 clone B56; BD Biosciences, Heidelberg, Germany) and 4 µg/mL of either anti-mouse IgG-Alexa Fluor 488 or anti-rabbit IgG-Alexa Fluor546 (Thermo Scientific). Nuclear staining was performed by incubation in Hoechst 33258 (Sigma-Aldrich, St. Louis, MO, USA) diluted at 2 µg/mL in PBS for 1 hour at RT. Afterwards, samples were mounted in FluorSave Reagent (Merck Millipore, Darmstadt, Germany) on microscope slides. Staining specificity was verified by staining with isotype control antibodies (rabbit IgG, clone SP137, Abcam). Images were taken with a Keyence BZ-9000 fluorescence microscope and relative quantification was performed making use of the Hybrid Cell Count tool provided by BZ-9000 Image Analysis Application (both from Keyence, Neu-Isenburg, Germany).
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3

Multi-Omics Analysis of Lymph Node Immune Cells

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Multi-color flow cytometric analysis was performed on mononuclear cells isolated from iliac LN samples. The following antibodies were used: LIVE/DEAD dead cell stain kit (Invitrogen); anti-CD8a (clone RPA-T8), anti-CD4 (clone OKT4), anti-PD-1 (clone EH12.2H7), anti-ICOS (clone C398.4A), anti-CD25 (clone BC96), anti-CXCR3 (clone G025H7) (BioLegend); anti-CXCR5 (clone MU5UBEE), anti-FOXP3 (eBioscience); anti-Bcl-6 (clone K112-91), anti-CD95 (clone DX2), anti-CD3 (clone SP34-2), and anti-Ki-67 (clone B56) (BD Biosciences); and anti-CD20 (clone B9E9), IgG (clone G18-145), IgM (G20-127) (Beckman Coulter).
For each BG505 SOSIPv5.2 Env trimer probe analysis, the biotinylated probes were individually premixed with fluorochrome-streptavidin conjugates (SA-Alexa647 and SA-BV421, Thermo Fisher Scientific and BioLegend) at room temperature (RT) for 20 min. After surface staining followed by washes, cells were fixed and permeabilized using FoxP3/Transcription Factor Staining Buffer kit (Thermo Fisher Scientific) according to manufacturer's protocols. Upon permeabilization, cells were stained with intranuclear Abs, washed twice and acquired on an LSR Fortessa Cell Analyzer (BD Biosciences). Flow cytometry data were analyzed with FlowJo (Tree Star).
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