immune system
• failed tolerance induction resulting in abundant autoantibody production, indicating that B cells are prevented from acquiring an anergic state
• B cells have about 10 fold lower bound HEL than in mutants with intact Pten, suggesting that receptor occupancy is reduced on mutant autoreactive B cells and that less HEL is available in adults for inducing and sustaining anergy
• increasing the concentration of free self-antigen confers an anergic phenotype on mutant B cells, but they remain long-lived
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