CD4+T cells were enriched from SPN and LN by complement lysis of cells bearing CD8 (3.155), MHC class II (M5/114), and heat-stable Ag (J11D) as described(38) (ATCC). CD25+ and CD25− cells were enriched using MACS column (Miltenyi Biotech) and sorted (FACS Aria, BD) for KJ126+ Foxp3-GFP+ CD62L+ CD44− naïve Tregs and KJ126+ Foxp3GFP− CD62L+ CD44− naïve Tconv cells.
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