IFNγ was measured as described from BDC2.5 cells 4h after 500μg i.v. of acetylated p31 peptide (YVRPLWVRME) (Genemed Sythesis) or OT-I cells after 1μg/ml SIINFEKL ex vivo for 4h (New England Peptide) [10 (link), 11 (link)].