3FFC:
reference: The shaping of T cell receptor recognition by self-tolerance., Gras S, Burrows SR, Kjer-Nielsen L, Clements CS, Liu YC, Sullivan LC, Bell MJ, Brooks AG, Purcell AW, McCluskey J, Rossjohn J, Immunity. 2009 Feb 20;30(2):193-203. Epub 2009 Jan 22. PMID: 19167249

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