Cell staining was performed with mAbs as listed above after blocking Fc–receptors with antibody clone 2.4G2. OVA-specific germinal center (GC) B cells were identified using 5 µg/mL OVA-488 (Invitrogen). IFNγ was detected as described (25 (link)). Cells were acquired on a Cyan ADP (Beckman Coulter) or LSR-Fortessa X20 (BD Biosciences) flow cytometer, and analyzed with Flowjo package 10 (Tree Star). Live/dead cells were distinguished using Live-Dead-eFluor780 (eBioscience).
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