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The location of each epitope on the Fas molecule recognized by the anti-Fas autoantibodies in sera from patients with silicosis (SIL), systemic lupus erythematosus (SLE), systemic sclerosis (SSc) and healthy volunteers (HV). The numbers with and without parentheses on the Fas molecule indicate the number of amino acids within the specified domains and the amino acid positioning of the domains within the Fas molecule, respectively. CRD, cysteine-rich domain.
